Homework Help: Chemistry

Posted by write2khin on Monday, May 3, 2010 at 8:24am.

Consider a 790-mL container at 21 °C in which the pressure of argon is 1.98x106 Pa.

a) What mass of argon (in g) is present in this container?
b) How many molecules is this?

Chemistry - DrBob222, Monday, May 3, 2010 at 11:15am
a) Use PV = nRT, solve for n
n = grams/molar mass, solve for grams.

b) 1 mole contains 6.022 x 10^23 molecules. How many moles do you have?
Chemistry - Anonymous, Monday, May 3, 2010 at 9:21pm
WHich (R) do I have to use

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