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OpenStudy (anonymous):
a substance is 54.1% Ca, 43.2% O and 2.7% H by mass. When 140g of this substance is reacted with 140g HCl it produces water and a salt. What is the mass of the salt produced from this reaction?
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OpenStudy (jfraser):
turn those percentages into mass, then turn those masses into moles. Find the mole ratio and you have a formula. then use the masses of the reactants (it's now a limiting reactant problem) to find the mass of product formed.
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