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3 years ago

Which statement describes the relationship between

Chemistry

1 answer:

timofeeve [1]3 years ago

3 0

Answer:

I'd have to see the diagram to figure this out. im sorry

Explanation:

if you have another question, i'll help

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How many moles of atoms are there in 27g of aluminium

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We know that the molar mass of Al is 27 g/mol.

27 g Al* (1 mol Al/ 27 g Al)= 1 mol Al.

The final answer is 1 mol Al~

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3 years ago

A. Exothermic<br> B. Isothermic<br> C. Endothermic

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Answer:

C. Endothermic

Explanation:

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3 years ago

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3 years ago

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Hydrogen gas is collected over water in an inverted buret. If the atmospheric pressure is 745 mm Hg, the vapor pressure of water

Varvara68 [4.7K]

Answer:

$P_{H_2}=727mmHg$

Explanation:

Hello there!

In this case, according to the given data, it is possible to infer that the gas mixture lies on the 15.0 cm-high column of water, so that the total pressure or atmospheric pressure is given by:

$P_{atm}=P_{water}+P_{H_2}$

Thus, since the atmospheric pressure is 745 mmHg and the vapor pressure of water is 18 mmHg, the pressure of hydrogen turns out to be:

$P_{H_2}=P_{atm}-P_{water}\\\\P_{H_2}=745mmHg-18mmHg\\\\P_{H_2}=727mmHg$

Best regards!

6 0

3 years ago