Multiple Choice
What is the mass of 0.25 mole of sodium (Na)?
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2. Atoms & Elements
Calculating Molar Mass
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How many grams of K2SO4 are present in 0.123 mole of K2SO4? (Molar mass of K2SO4 = 174 g/mol)
A
1.42 g
B
0.707 g
C
14.3 g
D
21.4 g
Verified step by step guidance1
Identify the given information: the amount of substance (moles) of K2SO4 is 0.123 mol, and the molar mass of K2SO4 is 174 g/mol.
Recall the formula to convert moles to grams: \(\text{mass (g)} = \text{moles} \times \text{molar mass (g/mol)}\).
Substitute the given values into the formula: \(\text{mass} = 0.123 \text{ mol} \times 174 \text{ g/mol}\).
Perform the multiplication to find the mass in grams (do not calculate the final value here, just set up the expression).
Interpret the result as the mass of K2SO4 present in 0.123 mole of the compound.
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