.
<h3>Explanation</h3>
Units of each quantity:
- <em>P</em> = 28 atm;
- <em>V</em> = 0.045 L;
- <em>n</em> = 0.020 mol;
Ideal gas constant:
.
Apply the ideal gas law:
.
All data given in this question come with two significant figures. Round the value of <em>T</em> to two significant figures:
.
I think it should be A option the election structure supports inactively
Answer:
The concentration of the new solution will be 0.31 M
Explanation:
The number of moles per liter of the solution is 0.50 mol. Then, in 50 ml there will be:
50 ml · (0.50 mol / 1000 ml) = 0.025 mol.
If we add 30 ml and assuming that the solution is an ideal solution, the final volume will be 80 ml.
Then, 0.025 mol will be present in 80 ml solution. In 1 l there will be:
1000 ml · (0.025 mol / 80 ml) = 0.31 mol.
The concentration of the new solution will be 0.31 M.
Answer: Option (a) is the correct answer.
Explanation:
A substance in which two or more elements are mixed together but these substances do not combine chemically to each other is known as a mixture.
For example, salt in water is a mixture as salt completely dissolves in water.
Whereas in carbon dioxide, carbon atom reacts chemically with oxygen atom. So, it is not a mixture.
Similarly, water vapor and oxygen gas are both compounds as they contain atoms which are present in similar composition.
Thus, we can conclude that out of the given options salt water is a mixture.
Answer:
4
Explanation:
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