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Gnesinka [82]
2 years ago
9

First to answer both CORRECTLY gets brainleist!

Chemistry
2 answers:
ycow [4]2 years ago
8 0

Answer: As the temperture of a main sequence star increases, the luminosity increases, vice versa

Cool and bright

Explanation:

madam [21]2 years ago
4 0

Answer: I am actually studying about Stars, so I got you.

3. As the temperature of a star Increases, it's luminosity increases.

As the temperature of a star decreases, it's luminosity decreases.

4. Hot and Bright. The bigger the star, the hotter it gets is from what I learned.

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What is the name of the base represented by the formula NH4OH
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Cho 4g CuO vào dung dịch axit clohidric 10% thì phản ứng vừa đủ.
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Answer:

Explanation:

a. CuO+ 2HCl⇒CuCl2+ H2O

b. n_{CuO}= \frac{4}{80}= 0,05 (mol)

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A mixture of helium, nitrogen and oxygen has a total pressure of 756 mmHg. The partial
Karolina [17]

Answer:

The  partial pressure of oxygen in the mixture is 296 mmHg.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone.

This relationship is due to the assumption that there are no attractive forces between the gases.

So, in this case, the total pressure is:

PT=Phelium + Pnitrogen + Poxygen

You know:

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Replacing:

756 mmHg= 122 mmHg + 338 mmHg + Poxygen

Solving:

756 mmHg - 122 mmHg - 338 mmHg = Poxygen

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<u><em>The  partial pressure of oxygen in the mixture is 296 mmHg.</em></u>

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