Question

8 g 0, molecules (number of molecules from mass)​

Answer 1

Answer:

1.50575 × $10^{23}$

Explanation:

Given data contains 8g$O_{2}$ molecules (number of the molecules form the mass). We have to calculate the number of particles in 8g$O_{2}$ molecules (number of the molecules form the mass).

We have to convert mass in grams to mass in moles. From the values of calculated moles, we can multiply the moles with Avogadro’s number to obtain the number of particles. We can find out the mass in moles from mass in grams using the molar mass.

We can calculate the moles using the formula,

$Moles= \frac{GivenMass(inGrams)}{Molar Mass}$

We have to substitute the values of mass (in grams) and the molar mass.

Molar mass of oxygen=32g/mol

The given mass of oxygen is8g.

We can calculate the moles as,

$Amount (in moles)= \frac{8g}{32g/mol}$

Amount (in moles)=0.25mole

So now, we can calculate the number of particles in 8g$O_{2}$  molecules using the formula,

N=n×$N_{A}$

Here, n=0.25mole and $N_{A}$=6.023×$10^{23}$

N=n×$N_{A}$

N=0.25mole × 6.023×$10^{23}$

N=1.50575 × $10^{23}$

∴  The number of particles present in 8g $O_{2}$ molecule is 1.50575 × $10^{23}$