# chemistry

how many joules of nutritional energy are in a bag of chips whose label reads 245 Cal? if 1 lb of fat is stored by the body for each 14.6X10(3) KJ of excess nutritional emergency consumed.how many bags of chips contain enough nutritional energy to result in 1lb of body fat?

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1. 245 Cal = 245 kcal = 245,000 calories
1 calorie = 4.184 J; therefore,
245,000 cal x (4.184 J/cal) = ? J.
?J x (1 kJ/1000) x (1 lb/14.6E3) = ?

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2. 0.0699 rounded to 3 sig figs.

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3. 245Cal x 4182J=1.03x10(6)J
(14.6x10(3)kJ x 1000J)/1.03x10(6)J=14.2
Rounded to 3 sig figs

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4. all of these wrong.

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5. Sandra was correct the answer is 14.2 bags.

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