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igor_vitrenko [27]
3 years ago
15

help!! i tried answering these on my own and turning it into my teacher and she said they were all wrong , can somebody help me

out here? if i could get the answers but also a slight explanation so i can understand please. id be extremely grateful

Chemistry
1 answer:
Kobotan [32]3 years ago
6 0
I don't know what your answers were but the more "stuff" there is the more energy it takes to freeze or boil it. Hope this could help
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A sample of 1.000 g of a compound containing carbon and hydrogen reacts with oxygen at elevated temperature to yield 0.692 g H₂O
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Answer :

(a) 1.000 g of compound containing carbon and hydrogen is, 0.922 g and 0.0769 g respectively.

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(a) Now we have to determine the masses of C and H in the sample.

The chemical equation for the combustion of hydrocarbon having carbon, hydrogen and oxygen follows:

C_xH_y+O_2\rightarrow CO_2+H_2O

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For calculating the mass of carbon:

In 44 g of carbon dioxide, 12 g of carbon is contained.

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For calculating the mass of hydrogen:

In 18 g of water, 2 g of hydrogen is contained.

So, in 0.692 g of water, \frac{2}{18}\times 0.692=0.0769g of hydrogen will be contained.

Thus, 1.000 g of compound containing carbon and hydrogen is, 0.922 g and 0.0769 g respectively.

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