객관식
Which of the following is the correct conversion of 45 miles per hour to kilometers per hour (km/h)? (Use 1 mile = 1.609 km)
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1. Intro to General Chemistry
Conversion Factors
객관식
If you have 200 grams of water, how many cups does this correspond to? (Assume 1 cup = 240 mL and the density of water is 1.00 g/mL.)
A
2.00 cups
B
1.20 cups
C
0.83 cups
D
0.42 cups
검증된 단계별 안내1
Identify the given information: mass of water = 200 grams, density of water = 1.00 g/mL, and 1 cup = 240 mL.
Use the density formula to find the volume of water in milliliters: \(\text{Volume} = \frac{\text{Mass}}{\text{Density}}\).
Calculate the volume in mL by dividing the mass (200 g) by the density (1.00 g/mL).
Convert the volume from milliliters to cups using the conversion factor: \(1 \text{ cup} = 240 \text{ mL}\), so \(\text{Volume in cups} = \frac{\text{Volume in mL}}{240}\).
Express the final answer as the number of cups corresponding to 200 grams of water.
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