Question

•how to find a molecular mass

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Answer 1

Answer:

We can find the molecular mass of the molecule by following the given substance:

Identify the formula of the compound or molecule

Using the formula determine the number of atoms present in each element of the compound or molecule

Multiply the atomic weight of each element with the number of atoms of that particular element

Similarly, do it for all the elements in the molecule or compound

Add up all the values obtained in the above step

Then add the unit as grams/mole you will get the molecular mass of the substance

Example:

Molecular mass of calcium carbonate

We know that calcium carbonate can be written as CaCO3

It contains 1 calcium element, 1 carbon, and 3 oxygen atoms

Ca= 1 x 40.1 = 40.1 { Atomic mass of calcium is 40.1}

C= 1 x 12.0 = 12 {Atomic mass of carbon is 12.0}

O : 3 x 16 = 48 { Atomic mass of oxygen is 16}

Adding up all the value we get

40.1 + 12+ 48= 100.1 g mol-1

Molecular mass of calcium carbonate is 100.1 g mol-1

Explanation:

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