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forsale [732]
3 years ago
14

How old was the oldest animal fossil help thx​

Chemistry
1 answer:
JulijaS [17]3 years ago
5 0

Answer:

the Rhyniognatha hirsti

Explanation:

at age 400 million years old

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Explanation:

The chemical formula magnesium sulfide written as MgS and NOT Mg_{2}S_{2} because charge on magnesium ion is +2 and charge on sulfide ion is -2.

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Therefore, MgS denotes one sulfur atom is attached to magnesium atom. Hence, we do not write the formula of magnesium sulfide as Mg_{2}S_{2} because this shows two magnesium atoms are attached to two sulfur atoms which is not true.

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