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2 years ago

PLZZ I WILL GIVE Braliest!!!

Chemistry

2 answers:

Semenov [28]2 years ago

5 0

Answer:

my answer d.

Explanation:

sorry if not true

9966 [12]2 years ago

3 0

$\huge{\mathbb{\tt {QUESTION:}}}$

What makes a radioactive decay chain end?

OA. The final element has the longest half-life.

OB. All mass has been converted to energy.

OC. The radiation is absorbed by something.

OD. The final product is not radioactive.

$\huge{\mathbb{\tt {ANSWER:}}}$

D. The final product is not radioactive

 $\huge{\mathbb{\tt {EXPLANATION:}}}$ 

A radioactive decay chain will end when the last particle formed is stable. The initial radioactive isotope is called the parent isotope.

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The balanced equation is:

$SiCl_4(l)+2Mg(s)\rightarrow 2MgCl_2(s)+Si(s)$

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From balanced equation, the coefficient of silicon tetra chloride is 1 and that of Mg is 2. So, we will divide the moles of silicon tetra chloride by 1 and that of Mg by 2 and see which one gives highest number.

For silicon tetra chloride, $\frac{0.317}{1}$ = 0.317

and for Mg, $\frac{2.67}{2}$ = 1.34

The highest number is for Mg and so the excess reactant for the forward reaction is Mg.

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