Calculate the number of moles equivalent to 5.0 gram of calcium oxide

Explanation:

The number of moles of a substance can be found by

where

n is the number of moles

M is the molar mass

m is the mass of the substance

To find the number of moles we must first find the molar mass

Chemical formula for calcium oxide is

So the molar mass of CaO is

M( CaO) = 40 + 16 = 56 g/mol

Mass of CaO = 5.0g

Substitute the given values into the formula

The number of moles in 5.0g of calcium oxide is

We have the final answer as

Hope this helps you

☃️ Chemical formulae ➝

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

Atomic weight of elements:

❍ Molecular weight of

= 40 + 16

= 56 g/mol

❍ Given weight: 5 g

Then, no. of moles,

⇛ No. of moles = 5 g / 56 g mol‐¹

⇛ No. of moles = 0.089 moles 0.09 moles

⚘ No. of moles of Calcium oxide in the given weight = 0.09 moles approx.

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