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Semenov [28]
3 years ago
5

What is the molarity of the solution with a volume of 23.47 Liters and 14.968 moles?

Chemistry
1 answer:
MrMuchimi3 years ago
3 0

Answer:

0.6378 M

Explanation:

Molarity is defined by Moles per liter.

Plugging the given information in, we get (14.968 moles)/(23.47 L) which comes out to be about 0.6378 M

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What is the age of mummified primate skin that contains 8.25% of the original quantity of 14C?
rjkz [21]

Answer:

20619.4793 years

Explanation:

The half life of carbon-14 = 5730 years

The formula for the half life for a first order kinetic reaction is:

t_{1/2}=\frac {ln\ 2}{k}

Where,  

t_{1/2} is the half life

k is the rate constant.

Thus rate constant is:

5730 years=ln(2)/k

k = 1.21×10⁻⁴ years ⁻¹

Using integrated rate law as:

ln\ \frac {A_t}{A_0}=-k\times t

Where,

A_t is the concentration at time t

A_0 is the initial concentration

Given that the final concentration contains 8.25 % of the original quantity which means that:

\frac {A_t}{A_0}=0.0825

So,

ln(.0825)= -1.21×10⁻⁴×t

<u> t = 20619.4793 years</u>

<u></u>

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4 0
3 years ago
A 2.50-l sample of a colorless gas at stp decomposed to give 2.50 l of n2 and 1.25 l of o2 at stp. what is the colorless gas?
Schach [20]

Answer;

N2O (Nitrogen (i) oxide.

Explanation;

The decomposition would be; 2N2O(g) = 2N2 (g)+ O2 (g)

Which means the ratio of; N2O :N2 :O2 = 2:2:1

The volume of colorless gas is 2.5 liters, N2 is 2.5 liters and oxygen is 1.25 liters; which also gives us a ratio of; 2: 2: 1.

Alternatively; here is twice as much N2 as O2. therefore; the formula would be N2O (nitrogen dioxide) to make 1 volume of N2 for every 2 volumes of O2.

4 0
3 years ago
Read 3 more answers
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