Multiple Choice
How many atoms of zinc are present in 0.60 mol of zinc?
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- 1. Intro to General Chemistry3h 48m
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2. Atoms & Elements
Mole Concept
Multiple Choice
A sample contains 18.0 g of water (H_2O). How many moles of molecules are present in this sample?
A
2.00 mol
B
9.00 mol
C
1.00 mol
D
0.50 mol
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Verified step by step guidance1
Identify the given information: the mass of water (H\_2O) is 18.0 g.
Recall the molar mass of water. Calculate it by adding the atomic masses of hydrogen and oxygen: Molar mass of H\_2O = (2 \(\times\) 1.008) + 16.00 g/mol.
Use the formula to find moles: \(\text{moles} = \frac{\text{mass}}{\text{molar mass}}\).
Substitute the known values into the formula: \(\text{moles} = \frac{18.0 \text{ g}}{\text{molar mass of H\_2O}}\).
Perform the division to find the number of moles of water molecules in the sample.
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