Calculate the mass of 156 mL of a gas whose density is 1.225 g/L. Express your answer in grams using the correct number of significant figures.

Question

Calculate the mass of 156 mL of a gas whose density is 1.225 g/L. Express your answer in grams using the correct number of significant figures. Do not enter your answer using scientific notation.

Answer 1

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Density = Mass/Volume

Make sure your units match, so volume needs to be converted from mL to L before using the equation, as density is reported in g/L.

Multiply density and volume to get mass, which equals 0.1911g, but we want to report to the correct number of sig figs. The numbers we were given were reported to 3 and 4 sig figs. Our answer will be reported to the smaller number if sig figs, which is 3.

Final answer is 0.191g