Question

What is the mass of 1.2 mol IrI3?​

Answer 1

Answer:

690 g IrI₃

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:

$1.2molIrI3 * \frac{572.92g}{1mol} = 687.504 g IrI3$

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