Can someone help me on the chemistry sheet: C3.8d Moles in life?
A sample of magnesium bromide (MgBr2) weighs 46g. How many moles of magnesium ions and bromide ions are in the sample?
Chemistry Homework Watch
- Thread Starter
- 29-01-2017 16:12
- 29-01-2017 19:01
first you work out how many moles of the total substance there is and then you multiply it by the number of specific ions in the molecule, in this case 1 magnesium and 2 bromides. so there are 0.25 moles of MgBr2 and therefore 0.25 moles of Mg+ and 0.5 moles of Br-