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lyudmila [28]
3 years ago
8

Four girls share 10 cookies equally.How many cookies does each friend get

Chemistry
2 answers:
8090 [49]3 years ago
7 0
10 divided by 4 = 2.5

each girl gets 2.5 cookies
mr Goodwill [35]3 years ago
3 0
I believe each girl should get 4 cookies each. :)
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Answer:

Yes

Explanation:

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. Copper(I) oxide, Cu2O, is reduced to metallic copper by heating in a stream of hydrogen gas. What mass of water is produced wh
maksim [4K]
Answer: 0.07868 mol H₂O

Explanation:

1) Chemical equation:

Cu₂O +H₂ → 2Cu + H₂O

2) mole ratios:

1 mol Cu₂O : 1 mol H₂ : 2 mol Cu : 1 mol H₂O

3) Convert 10.00 g of Cu to grams, using the atomic mass:

Atomic mass of Cu: 63.546 g/mol

number of moles = mass in grams / atomic mass = 10.00g / 63.546 g/mol

number of moles = 0.1574 mol

4) Use proportions

2mol Cu           0.1574 mol Cu
--------------- =  ---------------------
1 mol H₂O                   x

⇒ x = 0.1574 mol Cu × 1 mol H₂O / 2mol Cu = 0.07868 mol H₂O

That is the answer
7 0
3 years ago
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6.02*10^23

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A random person put the answer for you
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