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gizmo_the_mogwai [7]
3 years ago
12

What is the half life of a radioisotope if you started with 1 gram and 0.250 grams is left over after 6 days?

Chemistry
1 answer:
jolli1 [7]3 years ago
4 0

Answer:

3 DAYS

Explanation:

Half-life is the time required for a quantity of a radioisotope to reduce to half its initial value. It is represented as t1/2

In the question given,

t1/2 = 3 days

Since 1 gram of the radioisotope divides to half and give 0.5 grams = t1/2

Subsequently division yields;

1gram = 0.5 gram in 3 days

0.5 gram = 0.250 grams = 3 days

This is so because after 6 days, 0.250 gram of the radioisotope is remaining.

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GalinKa [24]

Answer:

4. 264.6J

5. 37.5J

6. 96J

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9. 6s

10. 750Watts

Explanation:

4). Mechanical energy (potential energy) = mass (m) × acceleration due to gravity (g) × height (h)

m = 3kg, h = 9m, g = 9.8m/s²

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5). Kinetic energy (K.E) = 1/2 × m × v²

Where;

m = mass (kg) = 3kg

v = velocity (m/s) = 5m/s

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Force = 12N, distance = 8m

Work done = 12 × 8

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7). Power = work done (J) ÷ time (s)

Work done = 550J, time = 10s

Power = 550/10

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8). Work done = force (F) × distance (m)

Work done = 540J, force = 7N, distance = ?

540 = 7 × d

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d = 540/7

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9). Power = work done (J) ÷ time (s)

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50 = 300/t

50t = 300

t = 300/50

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10). Power = work done (J) ÷ time (s)

This means that;

Power = force × distance / time

Force = 300N, distance = 5m, time = 2s

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An aqueous solution contains 1.00 g/L of a derivative of the detergent laurel alcohol. The osmotic pressure of this solution is
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Answer:

mm = 1043.33 g/mol

Explanation:

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