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velikii [3]
3 years ago
13

How many molecules of hydrogen gas will be produced when 0.2moles of aluminium react completely according to the following equat

ion
​
Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
5 0

Answer:

8

Explanation:

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Indicate the pH value as pH < 7, pH = 7 or PH > 7 for each of the following substances.
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A chemical change is like a physical change because no new substance is formed. Agree or DIsagree and reason why
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3 years ago
An unknown liquid is composed of 34.31% c, 5.28% h, and 60.41% i. The molecular weight is 210.06 amu. What is the molecular form
ozzi

In an unknown liquid, the percentage composition with respect to carbon, hydrogen and iodine is 34.31%, 5.28% and 60.41% respectively.

Let the mass of liquid be 100 g thus, mass of carbon, hydrogen and oxygen will be 34.31 g, 5.28 g and 60.41 g respectively.

To calculate molecular formula of compound, convert mass into number of moles as follows:

n=\frac{m}{M}

Molar mass of carbon, hydrogen and iodine is 12 g/mol, 1 g/mol and 126.90 g/mol.

Taking the ratio:

C:H:I=n_{C}:n_{H}:n_{I}

Putting the values,

C:H:I=\frac{34.31 g}{12 g/mol}:\frac{5.28 g}{1 g/mol}:\frac{60.41 g}{126.90 g/mol}=6:11:1

Thus, molecular formula of compound will be C_{6}H_{11}I.

4 0
3 years ago
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