Question

What is the mass of 1.2 mol IrI3?​

Answer 1

690 g IrI₃

Step-by-step explanation:

To convert from moles to grams, you have to use the molar mass of the compound. The molar mass of IrI₃ is 572.92 g/mol. You use this as the unit converter in this equation:

`1.2molIrI3 * (572.92g)/(1mol) = 687.504 g IrI3`

Round to the lowest number of significant figures which is 2 to get 690 g IrI₃.