What mass of a 0.583 molar solution of iron(III) nitrate is needed to obtain a) 0.0200 moles of iron(III) nitrate, b) 0.0500 mol
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<u>Answer:</u> The amount of kilocalories contained in the given serving of soup is 0.137 kCal
<u>Explanation:</u>
<u>As per the USDA:</u>
Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram.
We are given
Mass of fat in the soup serving = 5.0 g
Mass of carbohydrates in the soup serving = 20.0 g
Mass of protein in the soup serving = 3.0 g
Conversion factor used: 1 kCal = 1000 Cal
Applying unitary method:
- <u>For Fat:</u>
1 gram of fat provides 9 calories
So, 5.0 gram of fat will provide =
- <u>For Carbohydrates:</u>
1 gram of carbohydrates provides 4 calories
So, 20.0 gram of carbohydrates will provide =
- <u>For Proteins:</u>
1 gram of proteins provides 4 calories
So, 3.0 gram of fat will provide =
Total kilocalories per serving = [0.045 + 0.080 + 0.012] kCal = 0.137 kCal
Hence, the amount of kilocalories contained in the given serving of soup is 0.137 kCal