Given: Age of sample = 555
Half life = 111
So, number of half life =
=
= 5
Thus, number of half life of radioactive sample is 5
According to the equation, the ratio of
to
is
. Then:
Now we can calculate the mass of
formed.
Answer:
B
Explanation:
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1 mole = 6.022*10^23 atoms
4.2 moles sulfur = 4.2* 6.022 * 10^23 sulfur atoms = 2.421*10^24 sulfur atoms
1 mole sulfur = <span>32.065 g sulfur
4.2 moles sulfur = 4.2 * </span>32.065 g sulfur = 128.901 g sulfur
Answer:
As you go down a group on the periodic table, you get more electron shells and therefore a larger atomic radius.