Final answer:
Approximately 52.6 moles of water are present in a quart of water with a mass of 0.948 kg, when using the molar mass of 18.02 g/mol as the conversion factor.
Step-by-step explanation:
To determine how many moles of water are in a quart (which has a mass of 0.948 kg), the molar mass of water (18.02 g/mol) must be used as a conversion factor. Firstly, convert the mass of water from kilograms to grams, which is 948 g (0.948 kg × 1000 g/kg).
Next, use the molar mass to convert grams to moles:
Number of moles = mass in grams ÷ molar mass
Number of moles = 948 g ÷ 18.02 g/mol
The calculation yields the number of moles of water in the quart. With the given molar mass, the answer is approximately 52.6 moles of water (948 g ÷ 18.02 g/mol).