3 years ago

If 2g of an isotope has a half life of 7days,the half life of 1g of sample will be?

Chemistry

1 answer:

Mariulka [41]3 years ago

6 0

7 days i think. but not sure about this answer.

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Identify each description as either a physical or chemical change.

Anettt [7]

Answer:

1 - physical

2 -chemical

3 - chemical

4 - physical

5 - physical

6 - chemical

7 - physical

8 - chemical

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3 years ago

A bond formed by electrical attraction between two oppositely charged ions is called

Komok [63]

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3 years ago

What do coefficients in chemical equations tell you?

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3 years ago

If a sample of N2 gas has an initial pressure of 500 Torr and volume of 0.5 L, what will the final volume be if the pressure is

kherson [118]

Answer:

V₂ = 0.4 L

Explanation:

Data:

P₁ (initial pressure) = 500 torr
V₁ (initial volume) = 0.5 L
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Wanted:

V₂ (final volume)

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P₁V₁ = P₂V₂ → V₂ = P₁V₁ / P₂

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8 0

3 years ago

It has been found by mass spectrometric analysis that in nature, the relative abundances of the various isotopic atoms of silico

pochemuha

Answer:

This means that the isotope of silicon with a mass number of 28 is by far the most common of these three isotopes.

Explanation:

The abundance of Si-28 is 92.23%. Si-29 is 4.68% and Si-30 is 3.09%.

Because most Si atoms have a mass of 28 amu, the average mass of all silicon atoms is very close to 28.

Here is a video which summarizes how to calculate average atomic mass from data about mass and relative abundance.

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3 years ago