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Oksana_A [137]
3 years ago
11

Help?

Chemistry
1 answer:
pashok25 [27]3 years ago
7 0
I think it’s B, D, E
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Private land is generally used for _______. a. homes b. businesses c. factories d. all of the above Please select the best answe
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State law of conservation of mass and prove the law for below given chemical reaction
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The law of conservation of mass say that, in a chemical reaction, the mass of the reagents will always be equal to the mass of the products. This is shown in the reaction given below.

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99.9% of the matter that makes up living organisms consist of how many elements
gulaghasi [49]

Answer:

6 elements.

Explanation:

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3 years ago
Propenoic acid, C3H4O2, is a reactive organic liquid that is used in the manufacturing of plastics, coatings, and adhesives. An
Shkiper50 [21]

Answer:

C = 39%

H = 5.43%

Explanation:

Firstly, we calculate the number of moles of each.

For carbon, we use carbon iv oxide

Mass here = 0.636g

Number of moles of carbon iv oxide = mass of carbon iv oxide ÷ molar mass of carbon iv oxide. Molar mass = 44g/mol

Number of moles = 0.636 ÷ 44 = 0.014mole

Since 1 mole of carbon iv oxide contains 1 mole carbon, 0.014 mole of carbon iv oxide is also produced.

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For hydrogen, we use water .

Mass of water = 0.220g

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1 mole of water has two moles of hydrogen, thus the amount of hydrogen produced = 0.012 × 2 = 0.024mole

Mass of hydrogen produced = 0.024 × 1 = 0.024g

The percentage composition are as follows:

Carbon = 0.173/0.442 × 100 = 39%

Hydrogen = 0.024/0.442 × 100 = 5.43%

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3 years ago
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