How may moles are in 145.54 g of SIO2

The number of mole is 2.422 moles

Explanation:

To calculate the number of mole, we have to use the formula n = m / Mm

n - moles

m - mass

Mm - molar mass

Let's calculate the molar mass of the compound SiO2

Si - 28.0855

O - 15.999

Note: there are two atoms of oxygen in the compound

Mm of SiO2 = 28.0855 + 2 * 15.999

= 60.0835g/mol

Now, we calculate the number of moles

n = 145.54g / 60.0835g/mol

= 2.422mol