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3 years ago

Which of these scientists diagnosed smallpox and measles?

Chemistry

1 answer:

kotykmax [81]3 years ago

5 0

......................B. Al-Razi

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In living organisms, C-14 atoms disintegrate at a rate of 15.3 atoms per minute per gram of carbon. A charcoal sample from an ar

Schach [20]

Answer:

The answer is "4,241 .17 years"

Explanation:

The disintegration rate, which shows in C-14 atoms = $15.3 \frac{atoms}{min-g}$

Rate of sample disintegration = $9.16 \frac{atoms} {min-gram}$

The digit proportion of C-14 can be determined that is included in the sample $= \frac {9.16}{15.3} \\\\ = 0.5987$

5730 years from half-life.

The number with half-lives (n) which are repelled must be determined:

$(\frac{1}{2})^n= A\\\\A= fraction of C-14, which is remaining \\\\(\frac{1}{2})^n= 0.5987 \\\\ n \log 2 = - \log 0.5987\\\\$

$\therefore \\\\ \Rightarrow n= \frac{0.227}{0.3010} \\\\ = 0.740\\$

So, the age of the sample is given by = $n \times\ half-life$

$= 0.740 \times 5730 \ years \\\\=4241.17 \ years\\\\$

6 0

4 years ago

Need help with these three questions!!!

Elis [28]

Answer:

6. In order from left to right the balanced coeficcients are,

6, 1, 2, 3

8. $C_{7}H_{10}_{(l)}+6H_{(g)}=C_{7}H_{16}_{(l)$

9. In order from left to right the balanced coeficcients are,

1, 11, 7, 8

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3 years ago

1. What type of reaction is listed below? Prove that it is balanced by listing the number of elements on both side of the equati

ohaa [14]

Is there a mistake or am i doing something wrong

6 0

4 years ago

Read 2 more answers

Sea water, a solution composed of a variety of salts dissolved in water. the salt is the

luda_lava [24]

In seawater, salt is the solute and water is the solvent.

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3 years ago

Identify the reactants in the following equation.

Ratling [72]

Answer:

Li + Cl₂

Explanation:

left side of the arrow are reactants and right side of the arrow are products.

3 0

3 years ago