THIS IS THE 3RD TIME POSTING THIS, PLEASE HELP ME ANSWER THIS THE HOMEWORK IS DUE TONIGHT.

Write formulas for the compounds that form from In (Assume In charge is 3+.) and each of the following polyatomic ion: NO−3, SO2−4, PO3−4
-3, -4, -4 ARE THE CHARGES.
WHAT I TRIED IS InNO3,InSO6,InPO4

See your 8:14pm post.

I understand that you are asking for help in writing formulas for compounds formed from In (charge of 3+) and the polyatomic ions NO3- (charge of -3), SO4^2- (charge of -2), and PO4^3- (charge of -3). I'll explain the process of determining the correct formulas.

To write the formula for a compound, you need to ensure that the overall charge is neutral, which means that the sum of the charges of the individual ions must be zero.

For In (charge of 3+), we can assign a variable "x" to represent the number of In atoms that will combine with the polyatomic ions.

For NO3- (charge of -3), since we have a charge of -3 and In has a charge of +3, we only need one In ion to balance the charges. So, the formula for the compound is In(NO3)3.

For SO4^2- (charge of -2), since the charge is -2 and In has a charge of +3, we need two In ions to balance the charges. Therefore, the formula for the compound is In2(SO4)3.

For PO4^3- (charge of -3), since the charge is -3 and In has a charge of +3, we only need one In ion to balance the charges. So, the formula for the compound is InPO4.

In summary, the correct formulas for the compounds formed from In and the given polyatomic ions are:
1. In(NO3)3
2. In2(SO4)3
3. InPO4

I hope this explanation helps you understand how to determine the formulas for compounds formed from ions with different charges.