For the manufacture of semiconductor batteries, ultrapure silicon is used. The mass fraction of impurities in it should not exceed 0.0000000001%. Is silicon suitable for these purposes, 30 kg of which contains 0.03 mg of impurities?
Given: m (sample) = 30 kg = 30,000,000 mg, m (impurities) = 0.03 mg.
Find: ω (impurities) -?
Let’s calculate the mass fraction of impurities in the sample:
ω (impurities) = m (impurities) / m (sample) = 0.03 mg: 30,000,000 mg = 0.000000001, or,
multiplying this value by 100%, we get 0.0000001%.
Answer: no, since ω (impurities) = 0.0000000001%.
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