3 years ago

What is electrolysis What is alternating current

1 answer:

4 0

It is when you separate two substances using electricity of its molten state like aluminium oxide separates to aluminium and oxygen

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Diffusion is the movement of water between the cell membrane. <br>O True <br>O False

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2 years ago

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Which of the following mixtures may be act as a buffer solution?

lions [1.4K]

Answer:

B) HF, NaF

Explanation:

A buffer solution is made up of a weak acid and its conjugate base.
In this case, HF is a weak acid and NaF is the conjugate base, therefore the mixture of HF, and NaF would make a perfect buffer solution.
The buffer would have the weak acid HF and its conjugate base, F- which comes from the soluble salt NaF.

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3 years ago

Find the maximum mass of MgO that can be made from 2.4 of Mg and 2.4 of O2

Yanka [14]

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2 years ago

38.25 grams of silicon is combined with 14.33 grams of nitrogen gas. How many grams of silicon nitride can be formed if nitrogen

zhuklara [117]

3Si + 2N2 --> Si3N4 (as given)

n(Si) = m/MM = 38.25/28.085 = 1.3619 mol
n(N2) = 14.33/2*14.007 = 0.5115 mol

Therefore, N2 is limiting and Si is in excess
The molar ratio of 2N2:Si3N4 is 2:1
So, 0.0575 mol of silicon nitride is formed (dividing 0.5115 by 2)

m of silicon nitride= n*mm = 0.0575*140.283 = 8.06627... g
= 8.066g (4 significant figures)

(hopefully it is right, but double check in case i did something wrong) :)

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3 years ago

How do you separate alcoh0l from water?

Xelga [282]

Answer:

Fractional distillation

Explanation:

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2 years ago