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Mrrafil [7]
4 years ago
8

At dinner your brother got mad and threw your

Chemistry
2 answers:
Furkat [3]4 years ago
4 0

Answer: I think you have to subtract the distances

Explanation:

Rufina [12.5K]4 years ago
3 0

Answer:

72

Explanation:

Multiply 4 by 18

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The chemical compound, "AB" has a molar mass of 74.548 g/mol.
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PLSS HELP!! BRAINILIST WILL BE GIVEN!!
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3 years ago
100.0 mL of 3.8M NaCN, the minimum lethal concentration of sodium cyanide in blood serum
9966 [12]

The given question is incomplete. The complete question is:

Calculate the number of moles and the mass of the solute in each of the following solution: 100.0 mL of 3.8 × 10−5 M NaCN, the minimum lethal concentration of sodium cyanide in blood serum

Answer: The number of moles and the mass of the solute are 0.38\times 10^{-5} and 18.62\times 10^{-5}g respectively

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute

V_s = volume of solution in ml

3.8\times 10^{-5}M=\frac{n\times 1000}{100.0}

n=0.38\times 10^{-5}

n = moles of NaCN = \frac{\text {given mass}}{\text {Molar mass}}

0.38\times 10^{-5}=\frac{x}{49g/mol}

x=18.62\times 10^{-5}g

Thus the number of moles and the mass of the solute are 0.38\times 10^{-5} and 18.62\times 10^{-5}g respectively

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3 years ago
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