Question

Which of the following statements is true about a balloon filled with 1.00 mol of $C{O}_2$ at STP?
I. The contents of the balloon have a mass of $44.0$ g.
II. The balloon has a volume of $22.4$ L.
III. The balloon contains $6.02\times {10}^{23}$ molecules.

• A. I only
• B. III only
• C. I and II only
• D. II and III only
• E. I, II, and III

Answer 1

The correct option is E I, II, and III

The statements I, II, and III are true about a balloon filled with 1.00 mol of CO${}_2$ at STP.
I. The contents of the balloon have a mass of 44.0 g.
1.00 mole of any gas has mass equal to its molecular weight. For CO${}_2$ gas, the molecular weight is $44.0$ g/mole.
II. The balloon has a volume of $22.4$ L.
At STP, 1.00 mole of any gas occupies a volume of 22.4 L.
III. The balloon contains $6.02\times {10}^{32}$ molecules.
1.00 mole of any gas contains Avogado's number of molecules which is equal to $6.02\times {10}^{32}$ molecules.