객관식
Which of the following correctly describes how to convert a solution's concentration from millimolarity (mM) to molarity (M)?
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1. Intro to General Chemistry
Conversion Factors
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)
A
60.0 km/h
B
72.4 km/h
C
45.0 km/h
D
28.0 km/h
검증된 단계별 안내1
Identify the given quantity and the units to convert: 45 miles per hour (mi/h) needs to be converted to kilometers per hour (km/h).
Recall the conversion factor between miles and kilometers: 1 mile = 1.609 kilometers.
Set up the conversion by multiplying the given speed by the conversion factor to cancel out miles and introduce kilometers: \(45 \ \text{mi/h} \times \frac{1.609 \ \text{km}}{1 \ \text{mi}}\).
Perform the multiplication of the numerical values (without calculating the final number here) to find the speed in km/h: \(45 \times 1.609\) km/h.
Interpret the result as the speed in kilometers per hour, which will be the correct converted value.
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