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Luda [366]
3 years ago
9

Choose the correct coefficients for the following reaction:

Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
4 0

Hey there!

Mg(OH)₂ + H₂(SO₄) → Mg(SO₄) + H₂O

Balance O. (not including SO₄)

2 on the left, 1 on the right. Add a coefficient of 2 in front of H₂O.

Mg(OH)₂ + H₂(SO₄) → Mg(SO₄) + 2H₂O

Balance H.

4 on the left, 4 on the right. Already balanced.

Balance SO₄. (polyatomic ion)

1 on the left, 1 on the right. Already balanced.

Balance Mg.

1 on the left, 1 on the right. Already balanced.  

Our final balanced equation:

Mg(OH)₂ + H₂(SO₄) → Mg(SO₄) + 2H₂O

So your answer is a. 1, 1, 1, 2.

Hope this helps!

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The original mass of krypton 81 that is present in the ice is 6.70 grams.

<h3>How do we calculate original mass?</h3>

Original mass of any substance will be calculated as below for the decomposition reaction is:

N = N₀(1/2)ⁿ, where

N = remaining mass of krypton-81 = 1.675g

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n will be calculated as:
n = T/t, where

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t = half life time = 229,000 years

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Now putting all these values on the above equation, we get

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To know more about half life time, visit the below link:
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aleksklad [387]

Answer:

See picture below

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