Multiple Choice
How many moles are present in 8.5 × 10^{24} molecules of sodium sulfate (Na_2SO_4)?
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2. Atoms & Elements
Mole Concept
Multiple Choice
How many moles of carbon (C) are present in 440 mg of carbon dioxide (CO_2)?
A
0.0010 moles
B
0.044 moles
C
0.010 moles
D
0.022 moles
Verified step by step guidance1
Identify the given information: the mass of carbon dioxide (CO\_2) is 440 mg. Convert this mass into grams by dividing by 1000, since 1 g = 1000 mg.
Calculate the molar mass of carbon dioxide (CO\_2). Use the atomic masses: Carbon (C) = 12.01 g/mol, Oxygen (O) = 16.00 g/mol. The molar mass of CO\_2 is calculated as \(12.01 + 2 \times 16.00\) g/mol.
Determine the number of moles of CO\_2 by dividing the mass of CO\_2 in grams by its molar mass: \(\text{moles of CO\_2} = \frac{\text{mass of CO\_2 (g)}}{\text{molar mass of CO\_2 (g/mol)}}\).
Since each mole of CO\_2 contains 1 mole of carbon atoms, the moles of carbon will be equal to the moles of CO\_2 calculated.
Express the final answer as the number of moles of carbon present in 440 mg of CO\_2.
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