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irakobra [83]
2 years ago
11

What is the percent mass concentration of a solution that has 40g of NaOHin 500g of solution?

Chemistry
1 answer:
rodikova [14]2 years ago
5 0

Answer:

540

Explanation:

i added them and then the result is out

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If the density of methanol is 0.791g/ml, what is the mass of 0.750L of methanol
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3 years ago
1. When the temperature of a rigid hollow sphere containing 685 L of helium gas is
mote1985 [20]
<h3>Answer:</h3>

250.756 moles He

<h3>Explanation:</h3>

From the question we are given;

Volume, L = 685 L

Temperature, T = 621 K

Pressure, P = 189 × 10 kPa

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Using the Ideal gas equation,

PV = nRT, where P is the pressure, V is the volume, T is the temperature, n is the number of moles, and R is the ideal gas constant.

We can replace the known variables and constant in the equation to get the unknown variable, n.

Using ideal gas constant as 8.3145 L.kPa/K/mol

n=\frac{PV}{RT}

n=\frac{(1890)(685)}{(8.3145)(621)}

n = 250.7557 moles

   n = 250.756 moles

The moles of helium contained in the sphere is 250.756 moles

6 0
2 years ago
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Aliun [14]

Answer:

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Explanation:

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