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bogdanovich [222]
3 years ago
9

Kepler's Law of Planetary Motion __________ the movement of planets in the universe

Chemistry
1 answer:
ipn [44]3 years ago
3 0
Kepler's Law of Planetary Motion consists the movement of planets in the universe

if not? what are the four or three answers for me to answer?
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Which of the following is the correct sequence for the discovery of subatomic particles? a Electrons> Protons > Neutrons b
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Explanation;

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When water changes state from a liquid to a solid is energy absorbed or lost?
Brrunno [24]

Answer:

Loses

Explanation:

liquid changes into solid, heat is released. The energy released upon freezing, known as the enthalpy of fusion, is a latent heat, and is exactly the same as the energy required to melt the same amount of the solid.

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A mixture of helium, nitrogen, and oxygen has a total pressure of 752 mm Hg. The
NISA [10]

Answer: The partial pressure of oxygen in the mixture is 321 mm Hg

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

p_{total}=p_{He}+p_{N_2}+p_{O_2}

Given : p_{total} = total pressure of gases = 752 mm Hg

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p_{N_2} = partial pressure of nitrogen = 197 mm Hg

p_{O_2} = partial pressure of oxygen = ?

Putting in the values we get:

752mmHg=234mmHg+197mmHg+p_{O_2}

p_{O_2}=321mmHg

The partial pressure of oxygen in the mixture is 321 mm Hg

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