emanuel20971
contestada

A 50.0 g sample of an unknown
compound contains 14.19 g Na,
19.76 g O, and 16.05 g Cr. What is
the percent composition of Na in the
compound?

[? ] % Na

Respuesta :

andesrogelio21

Answer:

Get the mass of each element by assuming a certain overall mass for the sample (100 g is a good mass to assume when working with percentages).

(.7546) (100 g) = 75.46 g C

(.0443) (100 g) = 4.43 g H

(.2010) (100 g) = 20.10 g O

indrawboy

%Na=14.19/50 x 100% = 28.38%

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