We’re being asked to calculate for the number of moles of Zn(NO3)2 in 151.50 g of this substance.
Recall that the mass of one mole of any element or compound is equal to its molar mass or molecular weight.
This means that we need to do a mass to mole calculation.
The flow of the solution will be like this:
mass Zn(NO3)2 (molar mass Zn(NO3)2) → moles Zn(NO3)2
Calculate the following quantities.
Moles of Zn(NO3)2 in 151.50 g of this substance.
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