How many moles of ions are in 27.5 g of MgCl2?

Answer 1

This is a trick question. There are no ions in MgCl2, the ions are bonded together, suspended in a solid. In the case of MgCl2 this is a white power.

Answer 2

One mole of calcium carbonate, CaCO3 weighs 100 units. For our case we can say that there is 100g of CaCO3 in one mole of the substance. 27.5/100 yields 0.275 moles.

Answer 3

n=m/M

MMgCl2=(24,30+35,45*2)g/mol = 95,2g/mol

n=15g/95,2g/mol = 0,158mol

Answer 4

29/95 = 0.31 mol

Answer 5

0.898 mol

Answer 6

.293 MOLES