Homework Help: Chemistry

Posted by John S. on Friday, November 6, 2009 at 4:36pm.

Consider a sample of helium and a sample of neon, both at 30慢 and 1.5atm. Both samples have a volume of 5.0 liters. Which statement concerning these samples is not true?

a- each weighs the same amount
b- each has the same # of atoms of gas
c- the density of the neon is greater than that of the helium
d- each sample contains the same # of moles of gas
e- none of the above

Well, I thought that the weight is the number under the symbol on the periodic table, which would be 4.003 for helium and 20.18 for neon. And that would make a not true. But I also thought that the number above the symbol on the periodic table is the number of atoms in the element, which would be 2 for helium and 10 for neon. So b would not be true. But I cant have two answers so I have to be wrong somewhere in this thinking...

Chemistry - bobpursley, Friday, November 6, 2009 at 4:38pm
a is indeed wrong. The number above the atom symbol is the atomic number, the number of protons in the nucleus.
B is true by Avagradros hypothesis
e is wrong also.

Answer this Question

Related Questions

Chemistry - Consider a sample of helium and a sample of neon, both at 30ºC ...
chemistry - a sample containing 1.50 mol neon gas has a volume of 8.00L.what is ...
Chemistry - a sample of helium gas is in a closed system with a movable piston. ...
Science - Consider a mole of CO2 and a mole of N2O each at STP. Which of the ...
Chemistry - A 1.50mol sample of helium at a certain temperature and pressure ...
chemistry - A sample of helium gas has a volume of 325L at 25C and at 5atm. At ...
chemistry - A sample of helium gas has a volume of 325L at 25C and at 5atm. At ...
chemistry - A sample of helium gas has a volume of 325L at 25C and at 5atm. At ...
chemistry - A sample of helium gas has a volume of 325L at 25C and at 5atm. At ...
chemistry - A sample of helium gas has a volume of 325l at 25c and at 5atm. At ...

For Further Reading

First Name:
School Subject:
Answer: