객관식
Which of the following is the correct conversion factor to convert millimoles (mmol) to moles (mol)?
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1. Intro to General Chemistry
Conversion Factors
객관식
Which of the following is the correct mass in pounds (lb) for 90 kg? (Use the conversion factor: 1 kg = 2.2046 lb)
A
110.0 lb
B
220.5 lb
C
198.4 lb
D
40.8 lb
검증된 단계별 안내1
Identify the given quantity and the conversion factor: you have 90 kg and the conversion factor is 1 kg = 2.2046 lb.
Set up the conversion calculation by multiplying the mass in kilograms by the conversion factor to convert to pounds: \(\text{mass in lb} = 90 \ \text{kg} \times 2.2046 \ \frac{\text{lb}}{\text{kg}}\).
Perform the multiplication to find the mass in pounds (do not calculate the final number here, just set up the expression).
Check the units to ensure they cancel properly: kilograms (kg) cancel out, leaving pounds (lb) as the unit.
Compare the calculated value with the given options to identify the correct mass in pounds.
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