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aivan3 [116]
3 years ago
15

Is making ice cream a physical or chemical change

Chemistry
2 answers:
harina [27]3 years ago
5 0

Answer:

Physical change

Explanation:

kow [346]3 years ago
5 0
Making Ice cream is a physical change because none of the ingredients change but the temperature does and the texture does so it is physical
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Answer:

b

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If the half life of iridium-182 is 15 years, how much of a 3 gram sample is left after 2 half-lives?
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Answer:

D. 0.75 grams

Explanation:

The data given on the iridium 182 are;

The half life of the iridium 182, t_{(1/2)} = 15 years

The mass of the sample of iridium, N₀ = 3 grams

The amount left, N(t) after two half lives is given as follows;

N(t) = N_0 \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{1/2}} }

For two half lives, t = 2 × t_{(1/2)}

∴ t = 2 × 15 = 30

\dfrac{t}{t_{(1/2)}} = \dfrac{30}{15} = 2

\therefore N(t) = 3 \times\left (\dfrac{1}{2} \right )^2 = 0.75

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3 years ago
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How do you convert kilograms to pounds?
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