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Nikitich [7]
3 years ago
15

Hi question, what number should I change the 9 to so it's balanced?

Chemistry
1 answer:
Delicious77 [7]3 years ago
6 0

Answer:

3

Explanation:

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kakasveta [241]

Answer:

Ok?

Explanation:

5 0
3 years ago
______________ results in a new substance and it cannot be reversed
Rashid [163]
I believe it’s C ) chemical changes since chemical changes are usually permanent
4 0
4 years ago
Assuming a car (with a 70-L) gas tank can hold approximately 50,000 (5.00 * 10^4) g of octane(C8H18) or 50,000 (5.00 * 10^4) g o
konstantin123 [22]

Answer:

- From octane: m_{CO_2}=1.54x10^5gCO_2

- From ethanol: m_{CO_2}=9.57x10^4gCO_2

Explanation:

Hello,

At first, for the combustion of octane, the following chemical reaction is carried out:

C_8H_{18}+\frac{25}{2} O_2\rightarrow 8CO_2+9H_2O

Thus, the produced mass of carbon dioxide is:

m_{CO_2}=5.00x10^4gC_8H_{18}*\frac{1molC_8H_{18}}{114gC_8H_{18}}*\frac{8molCO_2}{1molC_8H_{18}}*\frac{44gCO_2}{1molCO_2} \\\\m_{CO_2}=1.54x10^5gCO_2

Now, for ethanol:

C_2H_6O+3O_2\rightarrow 2CO_2+3H_2O

m_{CO_2}=5.00x10^4gC_2H_6O*\frac{1molC_2H_6O}{46gC_2H_6O}*\frac{2molCO_2}{1molC_2H_6O}*\frac{44gCO_2}{1molCO_2} \\\\m_{CO_2}=9.57x10^4gCO_2

Best regards.

3 0
4 years ago
During _____________ there are 24 hours of daylight at the North Pole.
Tresset [83]

Answer:

summer

The North Pole stays in full sunlight all day long throughout the entire summer (unless there are clouds)

8 0
3 years ago
Vomiting is a response that allows some animals to
Eduardwww [97]

Answer: remove toxins from the body

Explanation: think of it. When you are sick you throw up. When you eat too much food you throw up

3 0
4 years ago
Read 2 more answers
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