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Talja [164]
3 years ago
14

Which sentence best describes the process of convection? A. A rock melts when magma touches it. B. Water vapor in the air forms

liquid water. C. Cool air sinks, which forces warm air to rise. D. Sunlight travels through space.
Can i please get help!
Chemistry
1 answer:
Soloha48 [4]3 years ago
6 0
Convection is when cool air sinks and warm air rises. i am not 100% sure though
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What material do we get from trees that is burnt as a fuel and releases carbon dioxide into the
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Answer:

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Find the empirical formula of the compound ribose, a simple sugar often used as a nutritional supplement. A 14.229 g sample of r
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Answer:

CH2O

Explanation:

Firstly, we need to convert the masses of the elements to percentage compositions. This can be done by placing the mass of each element over the total mass multiplied by 100% . We can start with carbon.

C = 5.692/14.229 * 100 = 40%

O = 7.582/14.229 * 100 = 53.29%

H = 0.955/14.229 * 100 = 6.71%

We then proceed to divide each percentage composition by their atomic mass of 12, 16 and 1 respectively.

C = 40/12 = 3.333

O = 53.29/16 = 3.33

H = 6.71/2 = 6.71

Dividing by the smaller value which is 3.33

C = 3.33/3.33 = 1

O = 3.33/3.33= 1

H = 6.71/3.33 = 2

The empirical formula of the compound ribose is CH2O

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3 years ago
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Is solubility a physical change? Defend your answer.
fredd [130]

Answer:

yes

Explanation:

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