I am not getting it
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If 5.40 g of reacts with excess oxygen and produces 0.350 L of at 299 K and 1 atm, what is the percentage yield of the reaction?
%
A piece of metal has a density of 7.5 and a volume of 39.6 . What is its mass in grams?
QUESTION 8
If 75mL of a 2.6M solution is diluted to a final concentration of 0.9M, what is the final volume of the solution?
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reacts with excess oxygen and produces 0.350 L of 
at 299 K and 1 atm, what is the percentage yield of the reaction?
and a volume of 39.6 
. What is its mass in grams?