404. That’s an error.

The requested URL /translate_c?depth=1&rurl=translate.google.com&sl=en&sp=nmt4&tl=hi&u=http://webbook.nist.gov/cgi/cbook.cgi%3FID%3D7647-15-6%26Units%3DSI&xid=17259,15700022,15700186,15700191,15700256,15700259,15700262,15700265,15700271,15700283&usg=ALkJrhg5jrQWQiwx7qwUgqJU0fjXa497VA was not found on this server. That’s all we know.