Multiple Choice
Which statement is true about the molar mass of chlorine gas (Cl_2)?
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2. Atoms & Elements
Calculating Molar Mass
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many moles of calcium (Ca) are present in a 425 g sample of calcium?
A
10.6 mol
B
6.02 mol
C
17.0 mol
D
2.13 mol
Verified step by step guidance1
Identify the given information: the mass of the calcium sample is 425 g.
Find the molar mass of calcium (Ca) from the periodic table. Calcium has an atomic mass of approximately 40.08 g/mol.
Use the formula to calculate moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the known values into the formula: \(\text{moles of Ca} = \frac{425\ \text{g}}{40.08\ \text{g/mol}}\).
Perform the division to find the number of moles of calcium in the sample.
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