How many moles of Pb(SO4)2 are equivalent to 157.9 g of Pb(SO4)2 (Mw. 399.34 g/mol)?
To find the number of moles, you need to divide the given mass by the molar mass. The molar mass of Pb(SO4)2 is 399.34 g/mol. Therefore, you can use the following formula to obtain the number of moles:
Number of moles = Mass (g) / Molar mass (g/mol)
Now, let's substitute the given values into the formula:
Number of moles = 157.9 g / 399.34 g/mol
By dividing the mass by the molar mass, we can calculate the number of moles.