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Sedbober [7]
4 years ago
8

Could you please help me with this

Chemistry
1 answer:
Reptile [31]4 years ago
8 0

Answer:

Chemical equation:

Sr + S → SrS

Explanation:

Mg react with sulfur and form magnesium sulfate.

Chemical equation:

Mg + S  →  MgS

The oxidation state of magnesium is +2  it loses its two valance electrons while sulfur gain two electrons to complete the octet. That's why one atom of magnesium combine with one atom sulfur.

Chemical equation:

Sr + S → SrS

The oxidation state of strontium is +2  it loses its two valance electrons while sulfur gain two electrons to complete the octet. That's why one atom of strontium combine with one atom sulfur.

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4 years ago
Read 2 more answers
What is the half-life of a radioisotope if a 50-g sample becomes 25 g after 18
vredina [299]

Answer:

18 DAYS IS THE HALF LIFE OF THE RADIOISOTOPE.

Explanation:

Using the formula

Nt = No * (1/2)^t/t1/2

where;

Nt = amount remaining = 25 g

No = Initial amounrt of the radioisotope = 50 g

t = time elapsed = 18 days

t1/2 = half life = unknown

Substitute the values into the equation and obtain the half life of the radioisotope;

Nt = No * (1/2) ^t/t1/2

25 = 50 * (1/2) ^18/t1/2

25 /50 =  (1/2)^18/ t1/2

1/2 = (1/2)^18/t1/2

1/2)^1 = (1/2)^18/t1/2

1 = 18/t1/2

t1/2 = 18 days.

So therefore the half life of the radioisotope is 18 days.

4 0
3 years ago
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