Which sequence represents the correct ranking of the amount of nitrogen per molecule, from least to most nitrogen? Urea, uric ac
1 answer:
Answer:
Ammonia, urea, uric acid
Explanation:
The given compounds are:-
Urea which has a molecular formula of and has 2 atoms of nitrogen per molecule.
Ammonia which has a molecular formula of and has 1 atom of nitrogen per molecule.
Uric acid which has a molecular formula of and has 4 atoms of nitrogen per molecule.
Thus,
The order from least to most nitrogen is:-
Ammonia, urea, uric acid
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From the given balanced equation we have find out the amount (in gm) of Ag formed from 5.50 gm of Ag₂O.
2Ag₂O(s) → 4Ag (s) + O₂ (g)
We know, molecular mass of Ag₂O= 231.7 g/mol, and atomic mass of Ag= 107.8 g/mol. Given, mass of Ag₂O=5.50 gm. Number moles of Ag₂O== 0.0237 moles.
From the balanced chemical reaction we get 2 (two) moles of Ag₂O produces 4 (four) moles of Ag. So, 0.0237 moles of Ag₂O produces moles=0.0474 moles of Ag= 0.0474 X 107.8 g of Ag=5.11g Ag.
Therefore, 5.50 g Ag₂O produces 5.11 g of Ag as per the given balanced chemical reaction.
<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