Multiple Choice
What is the mass, in grams, of 1.70 mol of carbon-12 (C)?
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- 1. Intro to General Chemistry3h 48m
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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 aluminum (Al) are present in a 54.0 g sample of aluminum? (Molar mass of Al = 26.98 g/mol)
A
0.020 moles
B
1.50 moles
C
0.500 moles
D
2.00 moles
Verified step by step guidance1
Identify the given information: the mass of aluminum (Al) is 54.0 g, and the molar mass of Al is 26.98 g/mol.
Recall the formula to calculate moles from mass and molar mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the given values into the formula: \(\text{moles of Al} = \frac{54.0\ \text{g}}{26.98\ \text{g/mol}}\).
Perform the division to find the number of moles of aluminum in the sample.
Compare the calculated moles to the provided answer choices to select the correct one.
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