37) The volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62 °C. The

Question

37) The volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62 °C. The gas is A) NO2 B) SO2 C) Ne E) NH3 38) The density ofis 0.900 g/L at STP A) N2 B) Ne C) NO D) CH4 E) CO 39) Of the following gases, has density of 2.104 g/L at 303 K and 1.31 atm. A) He B) Ne C) Kr D) Xe E) Ar 40) The density of air at STP is 1.285 g/L. Which of the following cannot be used to fill a balloon that will float in air at STP? A) CH4 B) HF C) NH3 D) NO E) Ne 41) The molecular weight of a gas that has a density of 7.10 g/L at 25.0 °C and 1.00 atm pressure is g/mol. A) 28.0 B) 6.85 x10-2 C5.75x 10-3 D) D) 14.6 E) 174 42) The molecular weight of a gas that has a density of 5.75 g/L at SIP is g/mol. A) 129 B) 141 C)1.73 × 10-3 D) 578 E) 3.90 43) The molecular weight of a gas is g/mol if 3.5 g of the gas occupies 2.1 L at STP. A) 37 B) 41 C)2.7 x 10-2 D) 5.5 x 103 E) 4.6 x 102 44) The molecular weight of a gas is g/mol if 6.7 g of the gas occupies 6.3 L at STP. A) 3.6 x 103 B) 27 C) 1.8 10-2 D) 24 E) 3.0 x 102

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37) The volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62 °C. The

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