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Alex Ar [27]
3 years ago
6

A firework exploding is an example of a (4 points) physical change chemical change phase change nuclear change

Chemistry
1 answer:
Irina-Kira [14]3 years ago
5 0
A firework exploding is a chemical change as soon as you light the fuse the combustion reacts with the gunpowder.

I hope this helps, good luck!!!!
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Derive third law of thermodynamics equation
Hoochie [10]

Answer:

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7 0
3 years ago
If there are 50 grams of U-238 on day zero of radioactive decay, how much will there be after 4.5 billion years? A) 0.0 grams B)
Natalija [7]

Answer:

= 25 g

Explanation:

Using the formula;

A = A₀ (1/2)^(t/h)

where A is the final amount,

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t is the time and

h is the half-life of the substance,

In this case; the half life of U-238 h is equal to 4.47 billion years.

A = A₀ (1/2)^(t/h)

A = 50 (1/2)^(4.5 / 4.47)

   = 24.88

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7 0
3 years ago
Read 2 more answers
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