Multiple Choice
What is the molar mass of Al_2(SO_4)_3?
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2. Atoms & Elements
Calculating Molar Mass
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What is the mass of 0.369 moles of Mg(NO3)2 (molar mass = 148.3 g/mol)?
A
24.5 g
B
99.2 g
C
40.2 g
D
54.7 g
Verified step by step guidance1
Identify the given information: the amount of substance (moles) is 0.369 moles and the molar mass of Mg(NO3)2 is 148.3 g/mol.
Recall the formula to calculate mass from moles and molar mass: \(\text{mass} = \text{moles} \times \text{molar mass}\).
Substitute the given values into the formula: \(\text{mass} = 0.369 \text{ moles} \times 148.3 \text{ g/mol}\).
Perform the multiplication to find the mass in grams (do not calculate the final number here, just set up the expression).
Interpret the result as the mass of Mg(NO3)2 corresponding to 0.369 moles, which can then be compared to the given answer choices.
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