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valkas [14]
3 years ago
11

4. Which of the following is not an example of a disturbance that might jumpstart

Chemistry
1 answer:
BigorU [14]3 years ago
7 0

Answer: D: a volcano forming a new island in a chain

Explanation:

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Elements whose names end with âium are usually metals; sodium is one example. Identify a nonmetal whose name also ends with âium
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Answer: Helium (He) and Selenium (Se) both are non metals ends with ium sound

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He is a inert gas and Se belongs to oxygen family (VI A group)

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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

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