7. The molar mass of pottasium dichromate(K2Cr2O7) = 294 g.
Answer: 878 kJ of energy is there in cheeseburger
Explanation:
Given : calorific value of fat = 38kJ/g
calorific value of carbohydrate = 17 kJ/g
calorific value of protein = 17kJ/g
1 g of fat contains energy = 38 kJ
7.0 g of fat contains energy =
1 g of carbohydrate contains energy = 17 kJ
25 g of fat contains energy =
1 g of protein contains energy = 17 kJ
11 g of protein contains energy =
Total energy = (266+425+187) kJ = 878 kJ
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