asked by @linhl13 •
10 months ago •
Chemistry
• 5 pts

- Hint: Determine moles first

We will use the gas equation to solve this problem:

PV=nRT

n=PV/RT

We have to convert 755 torr to atm and 505 mL to L

(755 torr)(1atm/760torr)=0.99 atm

(505 mL)(1L/1000mL)=0.505 mL

n=PV/RT

n=((0.99atm)(0.505mL))/(0.0821)(428K)

n=0.014277 moles

n is equal to moles which is mass/molar mass

MM=mass/moles

MM= (2.5g/0.01428moles)

MM=175.106 g/mol

answered by @reyn •
10 months ago

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