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Q1: What is the identity of a gas whose density is 2.29 g/L at a pressure...

Q1: What is the identity of a gas whose density is 2.29 g/L at a pressure of 1.5 atm and a
temperature of 30 °C?

A. Na C. O2
B. He D. F2

I got the caculation's answer as 37.978, but why is the correct gas F2?

Q2: When the equation below is balanced with the lowest possible whole numbers, what is the
coefficient for O2?
_C6H6(l) + _O2(g) → _CO2(g) + _H2O(g)

A. 1
B. 3
C. 6
D. 15

Why is the answer D?

Please answer both questions and thank you!

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