A radioactive isotope has a half-life of 2.0 years. The fraction of a pure sample of the isotope
2 answers:
Answer:
its a. 1/8
Explanation:
Answer:
1/8
Explanation:
Uhm whatever the guy said ^ yeah hope you pass
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I honestly don’t know sorry
Answer:
35.453
Explanation:
Answer:
5 million million atoms can fit at the end of a needle
Number of moles = number of atoms/Avogadro's number
= (4.8x10^25)/(6.02x10^23)
=79.7 mol (3sf)
A compound held together by ionic bonds is called a salt
