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kolbaska11 [484]
3 years ago
14

You discover a bottle of aqueous sodium chloride of unknown molarity. However, the bottle says that there are 0.75 moles of NaCl

dissolved and the total volume of the solution is 500.0 ml. What is the molarity of this solution? Note which type of calculation you need to perform, and then perform the calculation.
Chemistry
1 answer:
lara31 [8.8K]3 years ago
6 0
To calculate the molarity you only need to know the number of moles in the solution and the volume of that solution. This exercise gives both and with that you divide moles by volume(usually in liters).

500 ml equals 0,5 L
molarity= number of moles/ volume
molarity=0,75 x 0,5
= 0,375 mol/L
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Explanation:

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where, P is the pressure of the gas.

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R is the general gas constant.

T is the temperature of the gas (K).

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<em>∴ V₂ = (P₁V₁T₂)/(T₁P₂) </em>= (100.0 mmHg)(1000.0 mL)(273.0 K)/(296 K)(760.0 mmHg) =  121.4 <em>mL.</em>

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Mashutka [201]

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To solve this problem we will turn this question into an equation.

The equation for the perimeter of a rectangle is 2l + 2w = perimeter.

In the question we were given the perimeter so we can go ahead and plug this in.

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In the question we are also told that the fence is 3 times as long as it is wide. This means that 1l = 3w. We can now subsitute l for 3w so that we only have one variable.

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The length of the fence is 22.5ft and the width of the fence is 7.5ft.

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