Chemistry

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From a laboratory process designed to separate water into hydrogen and oxygen gas, a student collected 11.6 g of hydrogen and 65.9 g of oxygen. How much water was originally involved in the process?

don't understand how to work it out

• Chemistry -

This problem has the same trouble as in your other post below. It is SUPPOSED to be
water ==> hydrogen + oxygen
? .........11.6.......69.5
So water SHOULD be 11.6 + 69.5 but I get a different number if I work it a different way. I should get the same number both ways. That tell me that person making the problem just made up numbers.

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