# Chemistry

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The total Calories for 2 tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 16 g of fat, and 7 g of protein. Express your answer using one significant figure.

How do I figure out the amount of kcal per carb fat and protein?
Thanks
-MC

• Chemistry -

Nevermind, I think the answer is 192, but how do I express this in one sig fig?

• Chemistry -

192 in one s.f. is:
round to 200, then
2 x 10^2 or 2E2. I obtained 196 and not 192 BUT I may be using different numbers for kcal vs grams.
I used 4 kcal/g carb
4 kcal/g protein
9 kcal/g fat.

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