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What is the mass, in grams, of 1.70 mol of carbon-12 (C)?
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2. Atoms & Elements
Calculating Molar Mass
Scelta multipla
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
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Guida verificata passo dopo passo1
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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