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A carton of low-fat yogurt says it has [tex]1.70 \times 10^2[/tex] Calories ([tex]1.70 \times 10^5[/tex] cal). What is this energy in joules? Given that [tex]1[/tex] cal = [tex]4.184[/tex] J.

a. 711,000 J
b. 406 J
c. 40,600 J
d. 711 J

Answer :

The energy content of the low-fat yogurt is a. 711,000 J.

To convert the energy content of the yogurt from calories to joules, use the given conversion factor: 1 cal = 4.184 J.

The yogurt contains 1.70 x 10⁵ cal, which in joules is:

1.70 x 10⁵ cal x 4.184 J/cal = 711,280 J

The closest answer is: a. 711,000 J

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