Asked by Austin

Write so the charges are equal

Li+ and OH1-

Ca2+ and O2-

Al3+ and PO43-

Na1+ and S2-

Zn2+ and Cl1-

Al3+ and 02-
Answered by oobleck
shouldn't be a problem. Just find the Least Common Multiple. For example
LCM(3,2) = 6, so Al2O3
Answered by Austin
I'm sorry, I don't really understand. Can you explain more? Here's the problem again

Write so the charges are equal

Li+ and OH1-

Ca2+ and O2-

Al3+ and PO43-

Na1+ and S2-

Zn2+ and Cl1-

Al3+ and 02-

Answered by oobleck
in my example, Al3+ has a charge of +3
O2- has a charge of -2
So, you need to have as many + charges as you have - charges
Try various combinations
AlO: +3-2 = +1
Al2O: +3*2 - 2 = 6-2 = 4
AlO2: +3-2*2 = 3-4 = -1
Al2O3: +3(2)-2(3) = 6-6 = 0 <---

read up on finding the LCM of two numbers.
google is your friend
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