How many molecules are in 6.5 moles of hydrochloric acid, HCl?

There are two moles HCl formed for each mole of Cl2, hence 2 x 0.141 = 0.282 moles HCl is produced. = 0.282 x (1.008 + 35.45) = 10.3 g. (1.)

yes

explanation:

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"the periodic table is arranged in order of atomic number."