3 years ago

Ow do carbon-12 and carbon-13 differ?

Chemistry

1 answer:

Alex17521 [72]3 years ago

5 0

They have different amounts of neutrons.

Do u know why? Ok, because they are both cacbon, so they have the same amounts of protons : 6.

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Alchemy is a branch of ancient knowledge that states that the only three essential substances in nature are salt, sulfur, and me

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Answer:

It is pseudoscience because there are at least 118 known elements in nature.

Explanation:

Alchemy is an ancient branch of natural philosophy (not used much anymore).

I also just took the test and it's correct.

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3 years ago

A chemist dissolves 239 mg of pure potassium hydroxide in enough water to make up of solution. Calculate the pH of the solution.

PSYCHO15rus [73]

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2 years ago

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2 years ago

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Answer:

$n=0.430molH_2$

Explanation:

Hello!

In this case, considering the partial Dalton's law of partial pressures, we can notice that the total pressure equals the pressure of steam and the pressure of hydrogen, which can be determined as shown below:

$p_T=p_H+p_w\\\\p_H=811torr-12torr=799torr*\frac{1atm}{760torr}\\\\p_H=1.05atm$

Thus, by using the ideal gas law, we can compute the moles of hydrogen as shown below:

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Best regards!

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3 years ago

A square painting has a length of 62 cm.<br><br> What is the area of the painting?<br><br> cm²

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62 squared since it is a square, and area is base times height

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