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Anestetic [448]
3 years ago
9

What element is always present in an organic compound.

Chemistry
1 answer:
Andreyy893 years ago
3 0
Carbon is always present in an organic compound
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3 years ago
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
Please help me guys I’m so lost
maks197457 [2]

Answer:

3 seconds

Have a good day!

5 0
3 years ago
Read 2 more answers
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