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# What is the density of CO gas if 0.196 g occupies a volume of 100 mL?

The of ##CO## gas if ##0.196g## occupies a volume of ##100mL## is ##0.00196g/(mL)## or ##0.00196## grams per milliliter.

Using the density formula, ##D=m/V## where ##d## is density, ##m## is mass, and ##v## is volume, we will simply plug in the values in the question.

##m=0.196g## and ##v=100mL## therefore ##D=(0.196g)/(100"mL")##.

After doing the division the result is ##D=0.00196g/(mL)##.

For future reference, this equation can be used to solve for mass or volume too, if you manipulate it.

For mass, it's ##m=DV##.

For volume, it's ##V=m/D##.