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Nataliya [291]
3 years ago
7

Which isotope is most commonly used in the radioactive dating of the remains of organic materials?

Chemistry
1 answer:
Zarrin [17]3 years ago
8 0
(1) 14C also known as Carbon-14, is used to radio-date organic materials as well as earth materials.
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Explanation:

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8. What volume (ml) of a 5.45 M lead nitrate solution must be diluted to 820.7 ml to make a
Ganezh [65]

212 ml of lead nitrate is required to prepare a dilute solution of 820.7 ml of lead nitrate.

Answer:

Option A.

Explanation:

Similar to Avagadro's law, there is another law termed as dilution law. As the product of volume and normality of the reactant is equal to the product of volume and normality of the product from the Avagadro's law. In dilution law, it will be as product of volume and concentration of the solute of the reactant is equal to the product of volume and concentration of solution.

C_{1} V_{1} =C_{2} V_{2}

So, as per the given question C1 = 5.45 M of lead nitrate and V1 has to be found. While C2 is 1.41 M of lead nitrate and V2 is 820.7 ml.

Then, (5.45*V_{1} ) = (820.7*1.41)

V_{1}=\frac{820.7*1.41}{5.45}=  212.33 ml

So nearly 212 ml of lead nitrate is required to prepare a dilute solution of 820.7 ml of lead nitrate.

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Please help noowwwww... if you don’t know please don’t answer
pshichka [43]

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i honetly dont thing anyone knows that so look it up

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1. As you increase speed is there an increase or decrease in Kinetic Energy?
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\qquad \qquad\huge \underline{\boxed{\sf Answer}}

1. As you increase speed is there an increase or decrease in Kinetic Energy?

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<h3 />

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3. As you decrease speed is there an increase or decrease in Kinetic Energy?

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4. As you decrease mass is there an increase or decrease in Kinetic Energy?

\qquad \sf  \dashrightarrow \: decrease

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