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Blizzard [7]
3 years ago
14

How the relative density of a substance is related to the density calculate the density of iron if its relative density is 2 and

a density of water is 2gcm -3
Chemistry
1 answer:
il63 [147K]3 years ago
5 0

Answer:

How the relative density of a substance is related to the density calculate the density of iron if its relative density is 2 and a density of water is 2gcm -3

R.d= relative density of substance/ relative density of water

R.d= 2/2

R.d= 1gcm-3

Explanation:

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A piece of magnesium ribbon reacts with oxygen to form magnesium oxide, mgo. what is the percent composition of the compound? qu
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The Percent composition of  MgO is 60.304 % and 39.696 % respectively.

<h3>What percentage of the given chemical is there?</h3>

Mg + 1/2O₂ -------> MgO

We now want to know the percent composition of MgO in light of this reaction. Since the original reactants' and the product's mass are not provided, we can use the component's atomic weights to solve this problem.

Let's compute the molar mass of MgO since Mg has a molecular weight of 24.305 g/mol and O has a molecular weight of 15.999 g/mol:

molar mass of MgO= 24.305 + 15.999 = 40.304 \frac{g}{mol}

Now with this weight, let's see the percent composition of this compound:

Mg percentage  =\frac{24.305}{40.304 * 100}  = 60.304%

O percentage = \frac{15.999}{40.304 * 100}  = 39.696 %

The Percent composition of  MgO is 60.304 % and 39.696 % respectively.

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8 0
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Which statement explains why the bonds between non metals tend to be covalent?
djverab [1.8K]

They have small differences in electronegativity

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