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user100 [1]
3 years ago
14

When radiometric dating is done on a rock sample, the rock’s is determined.

Chemistry
2 answers:
hjlf3 years ago
5 0

Radiometric dating is done on rocks to determine their age

In this technique carbon -14 dating is used to determine the amount of carbon 14 which based on half life of the isotope gives the age of the rock.


Dennis_Churaev [7]3 years ago
3 0

absolute age

Just took the test

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In this reaction, what roll does the lead (II) nitrate play when 50.0 mL of 0.100M iron (III) chloride are mixed with 50.0 mL of
Aloiza [94]

Answer: The roll of lead (II) nitrate is that it is a limiting reactant of the reaction.

Solution : Given,

Molarity of FeCl_3 = 0.1 M

Volume of FeCl_3 = 50.0 ml = 0.05 L     (1 L = 1000 ml)

Molarity of Pb(NO_3)_2 = 0.1 M

Volume of Pb(NO_3)_2 = 50.0 ml = 0.05 L

First we have to calculate the moles of FeCl_3 and Pb(NO_3)_2.

\text{ Moles of }FeCl_3=\text{ Molarity}\times \text{ Volume in L}

\text{ Moles of }FeCl_3=(0.100M)\times (0.05L)=0.005moles

\text{ Moles of }Pb(NO_3)_2=\text{ Molarity}\times \text{ Volume in L}

\text{ Moles of }Pb(NO_3)_2=(0.100M)\times (0.05L)=0.005moles

The balanced chemical reaction is,

2FeCl_3+3Pb(NO_3)_2\rightarrow 2Fe(NO_3)_3+3PbCl_2

From the balanced chemical equation, we conclude that

3 moles of lead nitrate react with 2 moles of ferric chloride.

Thus 0.005 moles of lead nitrate react with =\frac{2}{3}\times 0.005=0.0033 moles of ferric chloride.

Moles of ferric chloride will be left unreacted = 0.005 - 0.0033 =0.0017 moles

Limiting reagent is the reagent in the reaction which limits the formation of product.

Excess reagent is the reagent in the reaction which is in excess and thus remains unreacted.

Therefore, in the given reaction, lead nitrate is the limiting reagent and ferric chloride is the excess reagent.

7 0
3 years ago
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The volume of a gas is always the same as the volume of __________.
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The answer would be A: its container.

Gas will expand to fill whatever container it is put in.
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10.0 Points 36 grams of water vapor takes up how many liters at room temperature and pressure (293 K and 100 kPa)?
AVprozaik [17]

100 kpa is correct

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4 years ago
How many grams (mass) are in 1.7 moles of Nickel II oxide NiO?
WARRIOR [948]

Answer:

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Explanation:

NiO has a molar mass of 74.7 g/mol. This means that one mole of nickel (II) oxide has a mass of 74.7 grams. We can use stoichiometry/dimensional analysis to figure out how many grams are in 1.7 moles.

1.7mol NiO (\frac{74.7grams}{1 mole} ) = 126.99g

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