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borishaifa [10]
3 years ago
7

When a solution labeled 0.50 m hno3 is diluted with water to give 0.25 m hno3, what happens to the number of moles of hno3 in th

e new solution?
Chemistry
1 answer:
Tju [1.3M]3 years ago
5 0

Answer;

The number of moles remains constant.

Explanation;

-A dilution is a solution made by adding more solvent to a more concentrated solution (stock solution), which reduces the concentration of the solute.

-To dilute a stock solution, the following dilution equation is used:

   M1 V1 = M2 V2.     where; M1 and V1 are the molarity and volume of the concentrated stock solution, and M2 and V2 are the molarity and volume of the diluted solution you want to make.

-The process of dilution keeps the amount of solute constant, but increases the total amount of solution, thereby decreasing its final concentration.


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To test such idea which was disproved later on, Becquerel wrapped photographic plates in black paper so that sunlight could not reach them. He then placed the crystals of uranium on top of the wrapped plates and put the whole set up outside, exposed under the sun.

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4 years ago
Balance the equations.<br> Zn+ HCl →<br> ZnCl2 +
motikmotik

Answer:

Zn + 2HCl → ZnCl2 + H2

Explanation:

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The complete equation is given below:

Zn+ HCl → ZnCl2 + H2

Now we can balance the equation by doing the following:

There are 2 atoms of Cl and 2 atoms of H on the left. This can be balanced by putting 2 in front of HCl as shown below:

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Consider the following reaction at 298K.
dmitriy555 [2]

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K > 1 (Because concentration of products is >>>> concentration reactants).

Eªcell > 0 Because reaction is spontaneous.

And n = 2 electrons because Pb(s) is oxidizing to Pb2+ and I₂ is reducing to I⁻ (2 electrons). Statements that are true are:

<h3>Eªcell > 0; n = 2</h3>
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In the question above, the only option that has opposing charges is option D so this is the correct option.

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Answer:

Heat from the Sun causes water to evaporate from the surface of lakes and oceans. This turns the liquid water into water vapor in the atmosphere. Plants, too, help water get into the atmosphere through a process called transpiration!

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