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2 years ago

Someone pls help me I will make you brain

Chemistry

1 answer:

Mamont248 [21]2 years ago

8 0

Answer:

lll and ll

Explanation:

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sveta [45]

The season that is starting is winter.
The answer to 21 is (4)

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3 years ago

Explain the difference between weathering and erosion.

yanalaym [24]

Answer:

So, if a rock is changed or broken but stays where it is, it is called weathering. If the pieces of weathered rock are moved away, it is called erosion.

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1 year ago

Determine the formula of chromic acid.

Katyanochek1 [597]

<u>Answer:</u> The formula of chromic acid is $H_2CrO_4$

<u>Explanation:</u>

We are given an ionic compound named as chromic acid. This acid is formed by the combination of hydrogen ion and chromate ion.

An acid is defined as the substance which releases hydrogen ion when dissolved in water.

Hydrogen is the 1st element of periodic table having electronic configuration of $1s^1$ .

This element will loose 1 electron to form $H^{+}$ ion.

Chromate ion is a polyatomic ion having chemical formula of $CrO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for the given compound is $H_2CrO_4$

Thus, the formula of chromic acid is $H_2CrO_4$

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2 years ago

How much time would it take for 9000 atoms of nobellium-253 (half-life is 97 s) to decay to 2250 atoms?

Svetradugi [14.3K]

Answer:it’s 828292atoms

Explanation

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2 years ago

How many moles of copper Atoms are in 4 moles of Cu3(po4)2

Galina-37 [17]

12 moles, there is 3 moles of copper in one mole of Cu3 (PO4)2, there four multiple 3 by 4 and you get 12

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2 years ago