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spayn [35]
2 years ago
14

How do I balance chemical equations?

Chemistry
1 answer:
Molodets [167]2 years ago
7 0
First you need to count the atoms of each element in the reactantsa and the products. Then use coefficients and place them in front of the compunds until the equations looks fully balanced.

Hope i helped
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Describe how to do an experiment to show that when you dissolve salt in water the salt is still there.
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Answer:

When salt is dissolved in water, the particles of salt get into the spaces between particles of water and starts dissolving and disappear.

Explanation:

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2 years ago
Calculate the mass, in grams, of cucl2 (mw = 134.452 g/mol) required to prepare 250.0 ml of a 6.11 % w/v cu2 (mw = 63.546 g/mol)
Sever21 [200]

6.11% w/v of Cu2+ implies that 6.11 g of Cu2+ is present in 100 ml of the solution

therefore,  250 ml of the solution would have: 250 ml * 6.11 g/100 ml = 15.275 g

# moles of Cu2+ = 15.275 g/63.546 g mole-1 = 0.2404 moles

1 mole of CuCl2 contain 1 mole of Cu2+ ion

Hence, 0.2404 moles of Cu2+ would correspond to 0.2404 moles of CuCl2

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The mass of CuCl2 required = 0.2404 moles * 134.452 g/mole = 32.32 grams

6 0
3 years ago
Which of the following is a force? A. mass B. volume C. weight D. length
pychu [463]

I believe it’s C......

7 0
3 years ago
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Why is the theoritical strngth of metals much higher than that observed experimentally
fiasKO [112]

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5 0
3 years ago
A sample of krypton gas in a container of volume 1.90 L exerts a pressure of 0.553 atm at 21 Celsius. How many moles of gas are
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Explanation:

pv = nRT

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3 years ago
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