chemistry
posted by SHARON .
A sample containing 5.20g O2 gas has a volume of 19.0L, pressure and temperature remain constant, Oxygen is released until the volume is 7.00L how many moles of O2 are removed
I know i convert 5.20g to moles which give me 0.1625 moles of O2 and i use the P=nRT/V formula but i still can't figure out the answer
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