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Olenka [21]
4 years ago
15

What is the molarity of a .25 liter solution containing 52 grams of HBr?

Chemistry
1 answer:
Phantasy [73]4 years ago
4 0
Molar mass HBr = 80.91 g/mol

number of moles:

mass of solute / molar mass

52  / 80.91 => 0.642 mols

Volume = 0.25 L

M = n / V

M = 0.642 / 0.25

M = 2.568 mol/L

hope this helps!

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It is longer than a solar eclipse

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5.77 g of nitrogen react with excess hydrogen producing 6.83 g of ammonia what is the percent yield. Determine/Label the actual
nata0808 [166]

Answer:

Percentage yield is 41.21%

Explanation:

Equation of reaction,

N₂ + 3H₂ → 2NH₃

Actual NH3 = 6.83g

Mass of N2 = 5.77g

Theoretical yield = ?

5.77g of N2 = 6.83g of NH3

14g of N2 = xg

X = (14 × 6.83) / 5.77

X = 95.62 / 5.77

X = 16.57g of NH3

Theoretical yield of NH3 is 16.57g

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% yield = 0.4121 × 100

% yield = 41.21%

The percentage yield of NH3 is 41.21%

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3 years ago
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What is the chemical formula for the most common fragment of formic acid?.
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7 0
2 years ago
10. A compound has an empirical formula of CH, and a molecular mass of 6 points
Bogdan [553]

Answer:

Molecular formula = C₅H₁₀

Explanation:

From the question given above, the following data were obtained:

Empirical formula of compound => CH₂

Molar mass of compound = 70.1 amu

Molecular formula of compound =...?

The molecular formula of a compound is usually a multiple (n) of the empirical formula i.e

Molecular formula = [CH₂]ₙ

Thus, to obtain the molecular formula of the compound, we must first determine the value of n. The value of n can be obtained as follow:

[CH₂]ₙ = 70.1

[12 + (2×1)]n = 70.1

[12 + 2]n = 70.1

14n = 70.1

Divide both side by 14

n = 70.1 / 14

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Molecular formula = [CH₂]ₙ

Molecular formula = [CH₂]₅

Molecular formula = C₅H₁₀

Thus, the Molecular formula of the compound is C₅H₁₀.

Explanation:

HOPE THIS HELPS!

7 0
3 years ago
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