chemistry
posted by suzy .
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?

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) = ? 
0.0699 rounded to 3 sig figs.

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