chemedx.org Website Information
Daily Unique Visits: 11,385
Daily Page Views: 56,925
Income Per Day: $142
Estimated Value: $85,200
This website is located in United States and is using following IP address 144.92.39.75. See the complete list of popular websites hosted in United States.
chemedx.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.
Website chemedx.org is using the following name servers:
- dns091.b.register.com
- dns232.a.register.com
- dns208.c.register.com
- dns249.d.register.com
and is probably hosted by WISC-MADISON-AS - University of Wisconsin Madison, US. See the full list of other websites hosted by WISC-MADISON-AS - University of Wisconsin Madison, US.
The highest website chemedx.org position in Alexa rank database was 51479 and the lowest rank position was 995305. Current position of chemedx.org in Alexa rank database is 119677.
Desktop speed score of chemedx.org (43/100) is better than the results of 17.28% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of chemedx.org (96/100) is better than the results of 46.59% of other sites and means that the page is mobile-friendly.
Mobile speed score of chemedx.org (55/100) is better than the results of 43.86% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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chemedx.org Alexa Rank
The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.
chemedx.org whois
WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.
Domain Name: CHEMEDX.ORG
Registry Domain ID: D158563198-LROR
Registrar WHOIS Server: whois.google.com
Registrar URL: https://domains.google.com
Updated Date: 2022-04-16T18:25:25Z
Creation Date: 2010-03-10T17:58:00Z
Registry Expiry Date: 2023-03-10T17:58:00Z
Registrar Registration Expiration Date:
Registrar: Google LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: registrar-abuse@google.com
Registrar Abuse Contact Phone: +1.8772376466
Reseller:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registrant Organization: Contact Privacy Inc. Customer 7151571251
Registrant State/Province: ON
Registrant Country: CA
Name Server: NS-CLOUD-B1.GOOGLEDOMAINS.COM
Name Server: NS-CLOUD-B2.GOOGLEDOMAINS.COM
Name Server: NS-CLOUD-B3.GOOGLEDOMAINS.COM
Name Server: NS-CLOUD-B4.GOOGLEDOMAINS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2022-05-14T13:42:21Z
Registry Domain ID: D158563198-LROR
Registrar WHOIS Server: whois.google.com
Registrar URL: https://domains.google.com
Updated Date: 2022-04-16T18:25:25Z
Creation Date: 2010-03-10T17:58:00Z
Registry Expiry Date: 2023-03-10T17:58:00Z
Registrar Registration Expiration Date:
Registrar: Google LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: registrar-abuse@google.com
Registrar Abuse Contact Phone: +1.8772376466
Reseller:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registrant Organization: Contact Privacy Inc. Customer 7151571251
Registrant State/Province: ON
Registrant Country: CA
Name Server: NS-CLOUD-B1.GOOGLEDOMAINS.COM
Name Server: NS-CLOUD-B2.GOOGLEDOMAINS.COM
Name Server: NS-CLOUD-B3.GOOGLEDOMAINS.COM
Name Server: NS-CLOUD-B4.GOOGLEDOMAINS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2022-05-14T13:42:21Z
chemedx.org server information
Servers Location
chemedx.org desktop page speed rank
Last tested: 2018-05-09
Desktop Speed
Bad
43/100
chemedx.org Desktop Speed Test Quick Summary
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priority - 3Leverage browser caching
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priority - 2Eliminate render-blocking JavaScript and CSS in above-the-fold content
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priority - 1Minify JavaScript
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chemedx.org Desktop Resource Breakdown
| Total Resources | 58 |
| Number of Hosts | 12 |
| Static Resources | 48 |
| JavaScript Resources | 15 |
| CSS Resources | 6 |
chemedx.org mobile page speed rank
Last tested: 2018-02-26
Mobile Speed
Bad
55/100
chemedx.org Mobile Speed Test Quick Summary
priority - 75Optimize images
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priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
https://www.chemedx.org/sites/www.chemedx.org/file…MqXdMiU84ekLLxQnc4.css
priority - 4Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
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priority - 1Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
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chemedx.org Mobile Resource Breakdown
| Total Resources | 58 |
| Number of Hosts | 12 |
| Static Resources | 48 |
| JavaScript Resources | 15 |
| CSS Resources | 6 |
chemedx.org mobile page usability
Last tested: 2018-02-26
Mobile Usability
Good
96/100
chemedx.org Mobile Usability Test Quick Summary
priority - 3Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target
The tap target
The tap target
The tap target
The tap target
The tap target
The tap target
The tap target
<a href="https://t.co/7SNK2zjUWT" class="ext">https://t.co/7…k is external)</a> is close to 1 other tap targets.The tap target
<a href="https://twitte…11151131643904" class="ext">Reply (link is external)</a> and 1 others are close to other tap targets.The tap target
<a href="https://twitte…11151131643904" class="ext">Reply (link is external)</a> and 1 others are close to other tap targets.The tap target
<a href="/node?page=4">5</a> and 1 others are close to other tap targets.The tap target
<a href="/category/chem…ties-structure" class="tagclouds level2">Atomic Properties / Structure</a> and 3 others are close to other tap targets.The tap target
<a href="/tagclouds/chunk/5">More</a> is close to 1 other tap targets.The tap target
<a href="/article/chemi…raphic-contest">Chemistry Infographic Contest</a> and 9 others are close to other tap targets.The tap target
<a href="/page/activity">Activities</a> and 23 others are close to other tap targets.chemedx.org HTML validation
Errors
Attribute “xmlns:fb” not allowed here.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute “xmlns:og” not allowed here.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute “xmlns:article” not allowed here.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute “xmlns:book” not allowed here.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute “xmlns:profile” not allowed here.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute “xmlns:video” not allowed here.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute “xmlns:product” not allowed here.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Bad value “toolbar” for attribute “role” on element “header”.
Line: 76 Column: 5 - 44
".../div> <header role="toolbar" id="user-header"> <di..."
".../div> <header role="toolbar" id="user-header"> <di..."
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Line: 222 Column: 89 - 197
".../ChemEdX"><img class="img-responsive" src="https://www.chemedx.org/sites/www.chemedx.org/files/twitterlogo_55acee.png"></a></..." Line: 222 Column: 250 - 358
".../ChemEdX"><img class="img-responsive" src="https://www.chemedx.org/sites/www.chemedx.org/files/fb-f-logo_blue_512.png"></a></..." Line: 222 Column: 394 - 493
"...gregator"><img class="img-responsive" src="https://www.chemedx.org/sites/www.chemedx.org/files/iconfeeds.png"></a></..."
".../ChemEdX"><img class="img-responsive" src="https://www.chemedx.org/sites/www.chemedx.org/files/twitterlogo_55acee.png"></a></..." Line: 222 Column: 250 - 358
".../ChemEdX"><img class="img-responsive" src="https://www.chemedx.org/sites/www.chemedx.org/files/fb-f-logo_blue_512.png"></a></..." Line: 222 Column: 394 - 493
"...gregator"><img class="img-responsive" src="https://www.chemedx.org/sites/www.chemedx.org/files/iconfeeds.png"></a></..."
Duplicate attribute “class”.
Line: 232 Column: - 291
"...chemchat" class="twitter-hasht..."
"...chemchat" class="twitter-hasht..."
Element “img” is missing required attribute “src”.
Line: 364 Column: 1 - 249
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/image/page/welcome-chemical-education-xchange.png?itok=tA-Jb_2T&timestamp=1478880945 220w" alt="ChemEd X logo" title="ChemEd X logo" /> <!-- ..." Line: 395 Column: 1 - 229
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/confessions-fixed-mindset.png?itok=3sY8A1c3&timestamp=1530564211 220w" alt="" title="" /> <!-- ..." Line: 426 Column: 1 - 226
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/tom-kuntzleman/chemistry-outer-space.png?itok=k6VT2vpe&timestamp=1530466396 220w" alt="" title="" /> <!-- ..." Line: 457 Column: 1 - 227
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/great-idea-bell-ringers.png?itok=KFsB4zVF&timestamp=1530113485 220w" alt="" title="" /> <!-- ..." Line: 488 Column: 1 - 255
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/removal-dye-adsorption-low-cost-material-quick-test.png?itok=W-ZuJaEq&timestamp=1529087837 220w" alt="" title="" /> <!-- ..." Line: 519 Column: 1 - 217
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/especially-jce-june-2018.jpg?itok=e1MEIDmH&timestamp=1529016739 166w" alt="" title="" /> <!-- ..." Line: 550 Column: 1 - 228
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/jce-9506-june-2018-issue-highlights.jpg?itok=QpfJHf-U&timestamp=1528948857 166w" alt="" title="" /> <!-- ..." Line: 581 Column: 1 - 249
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/2019-international-year-periodic-table-timeline-elements.png?itok=JIz-81yw&timestamp=1528865166 220w" alt="" title="" /> <!-- ..."
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/image/page/welcome-chemical-education-xchange.png?itok=tA-Jb_2T&timestamp=1478880945 220w" alt="ChemEd X logo" title="ChemEd X logo" /> <!-- ..." Line: 395 Column: 1 - 229
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/confessions-fixed-mindset.png?itok=3sY8A1c3&timestamp=1530564211 220w" alt="" title="" /> <!-- ..." Line: 426 Column: 1 - 226
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/tom-kuntzleman/chemistry-outer-space.png?itok=k6VT2vpe&timestamp=1530466396 220w" alt="" title="" /> <!-- ..." Line: 457 Column: 1 - 227
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/great-idea-bell-ringers.png?itok=KFsB4zVF&timestamp=1530113485 220w" alt="" title="" /> <!-- ..." Line: 488 Column: 1 - 255
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/removal-dye-adsorption-low-cost-material-quick-test.png?itok=W-ZuJaEq&timestamp=1529087837 220w" alt="" title="" /> <!-- ..." Line: 519 Column: 1 - 217
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/especially-jce-june-2018.jpg?itok=e1MEIDmH&timestamp=1529016739 166w" alt="" title="" /> <!-- ..." Line: 550 Column: 1 - 228
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/jce-9506-june-2018-issue-highlights.jpg?itok=QpfJHf-U&timestamp=1528948857 166w" alt="" title="" /> <!-- ..." Line: 581 Column: 1 - 249
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/2019-international-year-periodic-table-timeline-elements.png?itok=JIz-81yw&timestamp=1528865166 220w" alt="" title="" /> <!-- ..."
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Line: 364 Column: 1 - 249
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/image/page/welcome-chemical-education-xchange.png?itok=tA-Jb_2T&timestamp=1478880945 220w" alt="ChemEd X logo" title="ChemEd X logo" /> <!-- ..." Line: 395 Column: 1 - 229
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/confessions-fixed-mindset.png?itok=3sY8A1c3&timestamp=1530564211 220w" alt="" title="" /> <!-- ..." Line: 426 Column: 1 - 226
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/tom-kuntzleman/chemistry-outer-space.png?itok=k6VT2vpe&timestamp=1530466396 220w" alt="" title="" /> <!-- ..." Line: 457 Column: 1 - 227
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/great-idea-bell-ringers.png?itok=KFsB4zVF&timestamp=1530113485 220w" alt="" title="" /> <!-- ..." Line: 488 Column: 1 - 255
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/removal-dye-adsorption-low-cost-material-quick-test.png?itok=W-ZuJaEq&timestamp=1529087837 220w" alt="" title="" /> <!-- ..." Line: 519 Column: 1 - 217
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/especially-jce-june-2018.jpg?itok=e1MEIDmH&timestamp=1529016739 166w" alt="" title="" /> <!-- ..." Line: 550 Column: 1 - 228
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/jce-9506-june-2018-issue-highlights.jpg?itok=QpfJHf-U&timestamp=1528948857 166w" alt="" title="" /> <!-- ..." Line: 581 Column: 1 - 249
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/2019-international-year-periodic-table-timeline-elements.png?itok=JIz-81yw&timestamp=1528865166 220w" alt="" title="" /> <!-- ..."
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/image/page/welcome-chemical-education-xchange.png?itok=tA-Jb_2T&timestamp=1478880945 220w" alt="ChemEd X logo" title="ChemEd X logo" /> <!-- ..." Line: 395 Column: 1 - 229
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/confessions-fixed-mindset.png?itok=3sY8A1c3&timestamp=1530564211 220w" alt="" title="" /> <!-- ..." Line: 426 Column: 1 - 226
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/tom-kuntzleman/chemistry-outer-space.png?itok=k6VT2vpe&timestamp=1530466396 220w" alt="" title="" /> <!-- ..." Line: 457 Column: 1 - 227
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/great-idea-bell-ringers.png?itok=KFsB4zVF&timestamp=1530113485 220w" alt="" title="" /> <!-- ..." Line: 488 Column: 1 - 255
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/blog/deanna-cullen/removal-dye-adsorption-low-cost-material-quick-test.png?itok=W-ZuJaEq&timestamp=1529087837 220w" alt="" title="" /> <!-- ..." Line: 519 Column: 1 - 217
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/especially-jce-june-2018.jpg?itok=e1MEIDmH&timestamp=1529016739 166w" alt="" title="" /> <!-- ..." Line: 550 Column: 1 - 228
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/jce-9506-june-2018-issue-highlights.jpg?itok=QpfJHf-U&timestamp=1528948857 166w" alt="" title="" /> <!-- ..." Line: 581 Column: 1 - 249
"... 9]><!--> <img class="img-responsive" srcset="https://www.chemedx.org/sites/www.chemedx.org/files/styles/medium/public/images/article/2019-international-year-periodic-table-timeline-elements.png?itok=JIz-81yw&timestamp=1528865166 220w" alt="" title="" /> <!-- ..."
The “itemprop” attribute was specified, but the element is not a property of any item.
Line: 43 Column: 1 - 61
"...hange" /> <meta itemprop="name" content="Chemical Education Xchange" /> <meta..." Line: 44 Column: 1 - 64
"...hange" /> <meta itemprop="description" content="Change through Xchange" /> <meta..."
"...hange" /> <meta itemprop="name" content="Chemical Education Xchange" /> <meta..." Line: 44 Column: 1 - 64
"...hange" /> <meta itemprop="description" content="Change through Xchange" /> <meta..."
Warnings
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute with the local name “xmlns:article” is not serializable as XML 1.0.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute with the local name “xmlns:book” is not serializable as XML 1.0.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute with the local name “xmlns:profile” is not serializable as XML 1.0.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute with the local name “xmlns:video” is not serializable as XML 1.0.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Attribute with the local name “xmlns:product” is not serializable as XML 1.0.
Line: 9 Column: 16 - 44
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
"...TYPE html> <html lang="en" dir="ltr" xmlns:fb="http://ogp.me/ns/fb#" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#"> <head..."
Empty heading.
Line: 80 Column: 17 - 40
"... <h2 class="block-title"> </h2>..."
"... <h2 class="block-title"> </h2>..."
The “banner” role is unnecessary for element “header”.
Line: 87 Column: 1 - 74
"...</header> <header id="navbar" role="banner" class="navbar container navbar-default"> <di..." Line: 140 Column: 3 - 41
"...iner"> <header role="banner" id="page-header"> ..."
"...</header> <header id="navbar" role="banner" class="navbar container navbar-default"> <di..." Line: 140 Column: 3 - 41
"...iner"> <header role="banner" id="page-header"> ..."
The “navigation” role is unnecessary for element “nav”.
Line: 104 Column: 9 - 31
"...> <nav role="navigation"> ..."
"...> <nav role="navigation"> ..."
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Line: 122 Column: 5 - 116
"...ion"> <section id="block-search-api-page-default-node-index-search-page" class="block block-search-api-page clearfix"> ..." Line: 340 Column: 5 - 72
"...ent"> <section id="block-system-main" class="block block-system clearfix"> ..." Line: 336 Column: 5 - 30
"... <section class="col-sm-9"> ..." Line: 762 Column: 5 - 99
"...row"> <section id="block-menu-menu-policy-menu" class="block block-menu col-xs-12 col-md-6 clearfix"> ..." Line: 771 Column: 1 - 102
"... </div> <section id="block-block-2" class="block block-block col-xs-12 text-center text-muted small clearfix"> ..."
"...ion"> <section id="block-search-api-page-default-node-index-search-page" class="block block-search-api-page clearfix"> ..." Line: 340 Column: 5 - 72
"...ent"> <section id="block-system-main" class="block block-system clearfix"> ..." Line: 336 Column: 5 - 30
"... <section class="col-sm-9"> ..." Line: 762 Column: 5 - 99
"...row"> <section id="block-menu-menu-policy-menu" class="block block-menu col-xs-12 col-md-6 clearfix"> ..." Line: 771 Column: 1 - 102
"... </div> <section id="block-block-2" class="block block-block col-xs-12 text-center text-muted small clearfix"> ..."
The “complementary” role is unnecessary for element “aside”.
Line: 606 Column: 11 - 55
"... <aside class="col-sm-3" role="complementary"> ..."
"... <aside class="col-sm-3" role="complementary"> ..."
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chemedx.org Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
chemedx.org TRACEROUTE
Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.