# Chem

posted by .

Bob Pursley,

With regards to a question posted by john on Tuesday, January 30, 2007 at 6:14am:

How is it that you used 650 degrees C + 273 K when the question asks to presume it stayed gaseous down to 0 degrees C and to use this 0 degrees C for the answer?

Don't mean to question a better judgement than mine but should it not be 0 degrees C + 273 = 273 K?

Bob P is on-line right now BUT not at the computer so I will take the liberty of answering for him. I went back and found the original question and answers. He used PV=nRT twice. When he used PV=nRT the FIRST time, that was to find n, the number of moles. He used the conditions at that T and P which is as it should be. The original P and T were given so n could be calculated. In the SECOND calculation, where we are solving for V, he did use 760 mm Hg P and 273 (actually he made a typo and typed 274). I hope this answers your concerns.

Here is a periodic table on the web. Look up element number 116. What chemistry we know about that is there; also, it should have similar chemical properties to S, Se, Te, Po, etc.
http://www.webelements.com/

## Similar Questions

1. ### Chemistry Equation(again!)

Posted by chrissy on Saturday, January 6, 2007 at 1:23pm. In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. For Further Reading Chemistry …

when the oxide of arsnic is heated it sublimes and becomes a gas at 650oc and a pressure of 690mmHg the 0.927g sample of the oxide has a volume of 194cm calculate the volume in cm3 that the sample would have at 0oc and 760mmHg(ie at …
3. ### pH- from saturday

i posted this question previously and got help however im still having some confusion. can u clarify ?
4. ### Chemistry-quick question

Can someone tell me the formula to convert -20 degrees C into Kelvins?
5. ### anatomy and physiology II

why does air move into the lungs? Bob Pursley answered this question for you earlier. See you previous post of the same question
6. ### physics - last question

Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's …
7. ### AlgebrAlgebra-Mathmate or BobPursley or Reiny

I had asked a question earlier and bob pursley nicely answered it but I do have a question concerning it still- perhaps someone could clarify it- f(x) = logx is a logarthmic function. Bob Pursley said it could be because the base is …
8. ### Chemistry-help

How does a "chemical for synthesis" compare with the same chemical(ACS grade)when used in analytical testing?
9. ### Bob Pursley

Bob: Thank you for answering my Chemistry question. I apologize that it was on there twice. I accidentally posted again the same question instead of a different question. You answered the first question with precision. Thank you
10. ### Delete Question posted

Please delete question Posted by Donald on Sunday, January 24, 2016 at 10:00pm.

More Similar Questions