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ser-zykov [4K]
3 years ago
8

An unknown element is a mixture of

Chemistry
1 answer:
seropon [69]3 years ago
8 0

Answer:

10.13086%

Explanation:

129y + 132(1-y) = 129.91

129y + 132 - 132y = 129.91

-3y = -2.09

y = 0.69666 (5 s.f.)

% abundance of 132X = 100% - (129×0.69666)%

                                    = 100% - 89.86914%

                                    = 10.13086%

                                    = 10.1% (3 significant figures)

*y is just a variable for the equation

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