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Using your knowledge of typical charges for monoatomic ions, adjust the subscripts on each ion to form a charge-balanced (overall neutral) ionic compound

Chemistry

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Using your knowledge of typical charges for monoatomic ions, adjust the subscripts on each ion to form a charge-balanced (overall neutral) ionic compound.
If the subscript is 1, choose 1 -- DO NOT LEAVE IT BLANK. Use the lowest possible ratio to balance the charges.
(a) What ratio of K+ ions and P3− ions are needed to form a balanced ionic compound? Adjust the subscripts to give a balanced formula below.
K____ P ____
(b) What ratio of Br− ions and Mg2+ ions are needed to form a balanced ionic compound? Adjust the subscripts to give a balanced formula below.
Mg ____ Br _____
(c) What ratio of In3+ ions and S2− ions are needed to form a balanced ionic compound? Adjust the subscripts to give a balanced formula below.
In _____ S_____
(d) What ratio of N3− ions and Cr3+ ions are needed to form a balanced ionic compound? Adjust the subscripts to give a balanced formula below.
Cr ____ N______
(e) What ratio of Ti4+ ions and O2− ions are needed to form a balanced ionic compound? Adjust the subscripts to give a balanced formula below.
Ti_____ O______