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QveST [7]
3 years ago
9

1. How many particles are present in 800 grams of copper (II) sulfide, CuS? The molar mass of CuS is 95.611 g/mol.

Chemistry
1 answer:
wel3 years ago
8 0
1-5.037077324x10^23

Use these magic triangles they will help you a lot

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How many grams of sodium chloride are contained in 250.0 g of a 15% NaCl solution?
kramer

Given concentration of NaCl=15%

Means ,

In every 100g of Solution 15g of NaCl is present .

Now

  • Given mass=250g

So ,

\\ \Large\sf\longmapsto 250\times 15\%

\\ \Large\sf\longmapsto 250\times \dfrac{15}{100}

\\ \Large\sf\longmapsto 37.5g

<u>37.5g of NaCl present in 250g of solution.</u>

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2 years ago
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elixir [45]
<span>Express the answer in scientific notation and with the correct number of significant figures:
(6.32 x 10-4) ÷ 12.64
5.00 x 10^-5</span>
4 0
3 years ago
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Give the name of one of the 3 common acids used in chemistry
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Please hurry!
-Dominant- [34]

Answer:

c. liquid

Explanation:

because the are not very close if the said very closely packed together it would have been a solid

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