객관식
Which statement best describes the relationship between energy, chemical bonding, and stability?
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8. Thermochemistry
Nature of Energy
Multiple Choice
A snack bar contains 255 calories. How many joules of energy does this represent? (Note: 1 calorie = 4.184 joules)
A
1067 joules
B
1066.32 joules
C
255 joules
D
1067.92 joules
검증된 단계별 안내1
Identify the given information: the snack bar contains 255 calories, and the conversion factor is 1 calorie = 4.184 joules.
Write down the conversion formula to convert calories to joules: \(\text{Energy (joules)} = \text{Energy (calories)} \times 4.184\).
Substitute the given value of calories into the formula: \(\text{Energy (joules)} = 255 \times 4.184\).
Perform the multiplication to find the energy in joules (do not calculate the final number here, just set up the expression).
Interpret the result as the total energy in joules contained in the snack bar.
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