Multiple Choice
Which of the following is a definite indicator of a chemical change?
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1. Intro to General Chemistry
Chemical Properties
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A calorie and a kilocalorie are both units of energy. How many calories are equivalent to one kilocalorie?
A
1 calorie
B
1000 calories
C
100 calories
D
10,000 calories
Verified step by step guidance1
Understand the units involved: a calorie (cal) is a unit of energy, and a kilocalorie (kcal) is also a unit of energy but represents a larger amount.
Recall the prefix 'kilo-' in the metric system means 1000 times the base unit.
Therefore, 1 kilocalorie (kcal) is equal to 1000 calories (cal).
Express this relationship mathematically as: \$1\ \text{kcal} = 1000\ \text{cal}$.
Use this conversion factor to convert between kilocalories and calories whenever needed.
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