객관식
What is the molar mass of magnesium (Mg) atoms?
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2. Atoms & Elements
Calculating Molar Mass
객관식
What is the mass, in grams, of 1.5 moles of CO_2?
A
44.0 g
B
66.0 g
C
22.0 g
D
33.0 g
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검증된 단계별 안내1
Identify the given quantity and what is asked: You have 1.5 moles of CO_2 and need to find the mass in grams.
Recall the molar mass of CO_2: Calculate it by adding the atomic masses of carbon (C) and oxygen (O). The formula is \(\text{Molar mass of CO}_2 = 12.0\,\text{g/mol} + 2 \times 16.0\,\text{g/mol}\).
Calculate the molar mass of CO_2 using the formula above to find the mass of one mole of CO_2 in grams.
Use the relationship between moles and mass: \(\text{Mass} = \text{moles} \times \text{molar mass}\). Substitute the given moles (1.5) and the molar mass you calculated.
Multiply the number of moles by the molar mass to find the total mass of 1.5 moles of CO_2 in grams.
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