A mixture contains sodium chloride (NaCl) and sodium bromide (NaBr). The
mixture has a total mass of 10.00 g and contains 37.50
% sodium by weight
.
How much of each component (NaCl and NaBr) are present in the mixture?
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Hint: Remember the definition of percent composition.
(Assume x g NaCl and y g NaBr) (Atomic masses: Na = 239/mole
Cl = 35.5⁹/mole Br = 809/mole)
(xg NaCl)
23g Na
58.5 g NaCl)
+ (yg NaBr)
(10
23gNa
103 gNaBr.
= 3.750 gNa
x gNaCl + y gNaBr = 10.00g