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alisha [4.7K]
3 years ago
7

Use the scenario below to answer the following

Chemistry
1 answer:
Rom4ik [11]3 years ago
5 0

Answer:

i had this question a couple of weeks ago i just cant remember the answer other wise i would tell you but im sorry:( <3

Explanation:

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A fossil is found to have a 14 C 14C level of 70.0 70.0 % compared to living organisms. How old is the fossil?
natulia [17]

Answer:

The age of the fossil be 2.1987\times 10^{4} years.

Explanation:

Formula used :

N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}

where,

N_o = initial mass of isotope  C-14 = x

N = mass of the parent isotope left after the time, (t)  = 70.0% of x=0.07x

t_{\frac{1}{2}} = half life of the isotope  C-14 = 5730 years

\lambda = rate constant

Let the age of the fossil be t.

Now put all the given values in this formula, we get  t :

0.07x=x\times e^{-(\frac{0.693}{5730 years})\times t}

t=2.1987\times 10^{4} years

The age of the fossil be 2.1987\times 10^{4} years.

8 0
3 years ago
Of the three main states of matter, only gases can be compressed significantly.
rusak2 [61]
False! The three states of matter are solid, liquid, and gas. We can not touch gas, so it can not be compressed.
8 0
3 years ago
How to find the mole fraction of each gas in the vessel after the reaction
sattari [20]
Do DIMENSIONAL Analysis what comes up must come down
7 0
4 years ago
I need the Formulas for:
andrey2020 [161]

Explanation:

mass = desity × volume

volume = mass/density...

i believe thats right...

btw u means Physics formulae only..lol

3 0
4 years ago
URGENT PLEASSSEEE HELP
Vikki [24]

Answer:

0.4 * 10^-12 m

Explanation:

Frequency of the given Electromagnetic radiation is 7.50* 10^20 Hz

Speed of the electromagnetic radiation is 3*10^8 m/s

Hence wavelength is given by the formula: Speed/Frequency

Substituting the required values:

Wavelength = 3 * 10^8/7.50 * 10^20

=3/7.5 * 10^-12 = 0.4 * 10^-12 m

Hence the required wavelength of the electromagnetic radiation is 0.4*10^-12 m/s

6 0
3 years ago
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