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alexira [117]
3 years ago
15

a mixture of oxygen, hydrogen, and nitrogen exerts a total pressure of 378 kPa. if the partial pressures of oxygen and hydrogen

are 212 kPa and 101 kPa respectively, what is the partial pressure exerted by nitrogen?
Chemistry
1 answer:
kobusy [5.1K]3 years ago
7 0

This can be solved using Dalton's Law of Partial pressures. This law states that the total pressure exerted by a gas mixture is equal to the sum of the partial pressure of each gas in the mixture as if it exist alone in a container. In order to solve, we need the partial pressures of the gases given. Calculations are as follows:

<span>
</span>

<span>P = P1 + P2 + P3</span>

<span><span>378 kPa= 212 kPa + 101 kPa + P(H2)</span></span>

<span><span>P(H2) = 65 kPa</span></span>

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Answer:

Final calculated molarity of the unknown acid be  lower than the actual concentration.

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Volume actually measure was more than V that is = V'

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As we can see from the formula that molarity is inversely proportional to the volume of the solution.

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3 years ago
A liquid has a density of 0.87g/ml. What volume is occupied by 25g of liquid
irga5000 [103]

Answer:

29 mL

Explanation:

<h3>Equation</h3>

The question needs us to find the volume of the liquid. The equation for volume using density and mass is:

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<h3>Solve</h3>

We can substitute the given values for density and mass into the equation:

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<h3>Additional Comments</h3>

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Below are the significant figure rules:

Nonzero digits will always be significant (eg. 54 --> 2 significant figures)

Zeroes at the beginning of a number will never be significant (eg. 0.1 --> 1 significant figure)

Zeroes between two nonzero digits will always be significant (eg. 504 --> 3 significant figures)

Zeroes following a number will always be significant if the number contains a decimal point (eg. 40.0 --> 3 significant figures)

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