What is the mass of 2.50 L of sulfur dioxide gas,SO₂,at STP?

Name: What is the mass of 2.50 L of sulfur dioxide gas,SO₂,at STP?
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Question

Quizplus · Accepted Answer

At STP (Standard Temperature and Pressure), 1 mole of any gas occupies 22.4 L. The molar mass of sulfur dioxide (SO₂) is approximately 64 g/mol (32 for sulfur + 16x2 for oxygen). For 2.50 L of SO₂, the number of moles is $2.50 L \div 22.4 L/mol = 0.112 moles$. The mass of these moles is $0.112 moles \times 64 g/mol = 7.168 g$, which rounds to 7.15 g.

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