How many moles are present in a #"351 kg"# block of calcium?
The number of moles in
First determine the mass of one mole (i.e. molar mass) of calcium. The molar mass of an element is its atomic weight on the periodic table in g/mol.
The molar mass of calcium is 40.078 g/mol .
Next, since molar mass is g/mol, we need to convert 351 kg to g. There are 1000 g in 1 kg.
Next we'll convert the given mass to moles by dividing the given mass by the molar mass.
There are approx.
And molar quantity is simply the quotient:
Note that this calculation is dimensionally consistent. I wanted an answer in