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vichka [17]
3 years ago
7

____ 26. what is the weight percentage of nitrogen in urea, cn2h4o

Chemistry
1 answer:
Paraphin [41]3 years ago
7 0
Weight percentage of nitrogen can be calculated using the following rule:
weight percentage of nitrogen = (weight of nitrogen / weight of urea) x 100

From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of nitrogen = 14 grams
molecular mass of hydrogen = 1 grams
molecular mass of oxygen = 16 grams

therefore:
mass of nitrogen in urea = 2(14) = 28 grams
mass of urea = 12 + 2(14) + 4(1) + 16 = 60 grams

Substitute with the masses in the equation to get the percentage:
weight percentage of nitrogen = (28/60) x 100 = 46.667%
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33

Explanation:

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What is the total pressure of a gas mixture containing partial pressures of
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1.54 atm

Explanation:

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2 years ago
Identify whether each species functions as a Brønsted-Lowry acid or a Brønsted-Lowry base in this net ionic equation. HF (aq) +
VMariaS [17]

Explanation:

A Bronsted-Lowry base is a substance that accepts a proton in the form of a hydrogen (H) atom.

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In the forward reaction;

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Bronsted-Lowry base: SO32-

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8 0
3 years ago
1/2 - 3/7=??????????????????????​
Veseljchak [2.6K]
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6 0
2 years ago
How much heat is required to raise the temperature of 65.8 grams of water from 31.5ºC to 46.9ºC?
vodomira [7]

Answer: 1,013.32 cal × 4.18 J/cal = 4,235.68 J

Explanation:

1) Data:

Water ⇒ C = 1 cal/g°C

m = 65.8 g

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Tf = 36.9°C

Heat, Q = ?

2) Formula:

Q = mCΔT

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3 0
3 years ago
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