How many moles of HNO3HNO3 are present if 7.80×10−2 molmol of Ba(OH)2Ba(OH)2 was needed to neutralize...

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How many moles of HNO3HNO3 are present if 7.80×10⁻² molmol of Ba(OH)2Ba(OH)2 was needed to neutralize the acid solution?

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