How many joules are equivalent to 450 calories? A) 0.45 J B) 4.5 $\times$ 10² J C) 9.3$\times$ 10^-3 J D) 1.9 $\times$ 10³ J E) 4.5 $\times$ 10⁵ J

Question

Quizplus · Accepted Answer

The conversion factor between calories and joules is 1 cal = 4.184 J. Therefore, to convert 450 calories to joules:

450 cal x (4.184 J/cal) = 1885.8 J

Rounded to the nearest tenth, this is 1.9 x 10^3 J, which corresponds to choice D.

How Many Joules Are Equivalent to 450 Calories? A) 0 ×\times×