how many grams of CaO are required for complete reaction with the HCl in 275mL of a 0.523 M HCl?

Answer 1

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Answer 2

write the balanced equation:

CaO + 2HCl >> CaCl2 + H2O

Note then that it takes half as many moles of CaO as it does HCl.

Moles HCl: .275*.523

moles CaO: half that.

grams CaO: molesCaO*molmassCaO