Calculate the number of moles in each of the following masses: 0.039 g of palladium 0.0073 kg of tantalum

The number of moles of palladium and tantalum are 0.00037 mole and 0.0000404 mole respectively

Explanation:

Number of mole = reacting mass/molar mass

n = R. m/m. m ... Equation 1

Where n = number of moles, R. m = reacting mass, m. m = molar mass.

For palladium,

R. m = 0.039 g and m. m = 106.42 g/mol

Substituting theses values into equation 1

n = 0.039/106.42

n = 0.00037 mole

For tantalum,

R. m = 0.0073 and m. m = 180.9 g/mol

Substituting these values into equation 1

n = 0.0073/180.9

n = 0.0000404 mole

Therefore the number of moles of palladium and tantalum are 0.00037 mole and 0.0000404 mole respectively