What is the mass in grams of 0.48 mol of platinum pt

To determine the mass, you need first to find the molar mass.
To find it,  you have to consult the periodic table and see the atomic mass of each element. If the element is repeated, for example 3 times, you multiple the atomic mass per 3. In this case, the element platinum is not repeated.

molar mass: 195,084 g/mol

To discover the mass, you use a formula that says that moles is calculated by dividing mass by molar mass.
moles: 0.48 mol
molar mass: 195,084 g/mol
mass= x

0,48= x / 195,084
x= 93,64 grams

Talc (french chalk) is the ingredient