5.74 g of mg reacts with hcl calculate the moles of h from 0.0840 and excess hcl
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I answered this question for you. It's below. Also, I notice it's just as confusing as before AND you didn't follow any of my advice. That isn't a good way to get help if you need help.
5.74g of mg reacts with hcl to produce mgcl and h calculate the number of moles of h from 0.0840 mg and excess hcl