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)NO C)Ne D)NH₃ E)HF

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Quizplus · Accepted Answer

The density of a gas is directly related to its molar mass. For a balloon to float, the gas inside must be less dense than air. NO (Nitric Oxide) has a molar mass of 30 g/mol, which is higher than the molar mass of air (approximately 29 g/mol), making it denser than air and unsuitable for floating a balloon.

The Density of Air at STP Is 1