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mart [117]
3 years ago
10

Josh prepares a solution by mixing sodium nitrate and water. To calculate the molarity of the solution, Josh should calculate th

e moles of which substance, and why?
Chemistry
1 answer:
Sauron [17]3 years ago
3 0
Of the sodium nitrate as molarity of a solution is expressed as the number of moles of a given substance per 1000cm3 or 1dm3 of water 
hope that helps
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What is the temperature of 0.500 moles of a gas that is stored in a 2.50 L container under 13.0 atm of pressure?
faust18 [17]
<h2>Answer:</h2>

Moles of a gas = 0.500

Volume = 2.50 L

Pressure = 13. atm

Temperature = ?

Solution:

Formula:

                       PV = n RT

Putting the values in formula:

 T = PV/nR = 13 * 2.5 / 0.5 *  0.082057

   =  32.5/0.041 = 792.68 K

                    T = 792.68 K

3 0
3 years ago
Scientists have developed the Atomic Theory over a period of hundreds of years. What will help us further the development? A. in
stepladder [879]

Answer:

A. increasing the ability of technology, like microscopes, to see even smaller particles

8 0
3 years ago
lighting a match results in light and heat since energy was not created by the match what transformation took place
Contact [7]

It is a chemical reaction


7 0
3 years ago
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Question 2 of 5<br> What do you know about a substance it you know its temperature?
notka56 [123]
One may know how close the molecules within the substances are packed together. Hot substances have molecules that are farther apart, cold substances have molecules that are more compact/closer together.
5 0
3 years ago
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1. the purpose of the aqueous solutions in a galvanic cell is to?
ludmilkaskok [199]

Answer:

1. The correct option is;

c. maintains charge balance in the cell

2. The correct option is;

c. +3.272 V

Explanation:

The aqueous solution in a galvanic cell is the electrolyte which is a ionic solution containing that permits the transfer of ions between the separated compartment of the galvanic cell such that the overall system is electrically neutral

Therefore, the aqueous solution maintains the charge balance in the cell

2. Here we have;

B₂ + 2e⁻ → 2B⁻ Ecell = 0.662 V

A⁺ + 1e⁻ → A Ecell = -1.305 V

Hence for the overall reaction, we have;

2A + B₂ → 2AB gives;

(0.662) - 2×(-1.305)  = +3.272 V.

4 0
3 years ago
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