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3 years ago

Why is the chemical formula magnesium sulfide written as MgS and NOT Mg2S2?

Chemistry

2 answers:

Anna71 [15]3 years ago

8 0

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.

Therefore, these charges will cancel out each other as we write the formula in simplest crisscross method.

Also, the numbers in a chemical formula display the total number of atoms attached with each other or central atom.

For example, in $CaCl_{2}$ there are two chlorine atoms attached to one calcium atom.

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.

Ksivusya [100]3 years ago

6 0

Answer:

the answer is D

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In an experiment, 34.8243g of copper (II) nitrate hydrate, Cu(NO3)2•zH2O was heated to a constant mass of 27.0351g. Calculate th

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4 years ago

Read 2 more answers

sample with masses 0.12g,1.8g, and 0.562g are mixed together the combind mass of the three samples expressed to the correct numb

allsm [11]

Answer:

2.5 g

Explanation:

Given data:

Masses of sample = 0.12 g, 1.8 g, 0.562 g

Combine mass of samples = ?

Solution:

When we add or subtract the values the number of significant figures after decimal in result must be equal to the given measurement having less number of decimal places.

0.12 g + 1.8 g + 0.562 g

2.482 g

In given three measurements 1.8 has less number of significant figure after decimal point which is only one digit. Thus the final value must contain one digit after decimal.

we will round of 2.482 g.

2.5 g

because the next digit after 4 is 8 that's why we will round 4 to 5.

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