Question

calculate the no. of moles in 10g of caco3

Answer 1

Molecular mass of CaCO3

= 40 + 12 + 3*16

= 100u.

It means 1 mole = 100g

Hence 10 g = 0.1 mole.

Hope it's helpful to u.

Answer 2

Given:

Mass of $CaCO_3$ = 10g

To find:

Number of moles in 10g of $CaCO_3$ = ?

Formula to be used:

Number of moles = $\frac{Given mass}{Molar mass}$

Calculation:

To calculate the molar mass of $CaCO_3$, the mass of individual element present in the compound must be known:

Atomic mass of Ca = 40

Atomic mass of C = 12

Atomic mass of O = 16. As 3 Oxygen are present 3×16 = 48

Thus the Molar mass of $CaCO_3$ = 40+12+48 = 100g/mol

As the given mass as well as molar mass is known, number of moles can be calculated as follows:

Number of moles = $\frac{Given mass}{Molar mass}$ = $\frac{10g}{100g/mol} = 0.1 mole$

Conclusion:

Thus it is inferred that 10g of $CaCO_3$ contains 0.1 mole.

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