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9 November, 16:22

How many hydrogen atoms are in 78.4 grams of hydrochloric acid

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  1. 9 November, 19:16
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    You should get about 78.4 g H. Convert grams of HCl to moles of HCl by finding total atomic mass of HCl. From there, convert mole of HCl to moles of H which is 1. Last, convert moles of H to g H which is 1g and you should get your answer. Don't forget significant figures. Since you are given 3 in your given information, your answer should have 3 significant figures.
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