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Ulleksa [173]
3 years ago
8

How is precambrian time different from other divisions of the geologic time scale?

Chemistry
1 answer:
Naya [18.7K]3 years ago
8 0

The Precambrian is the earliest of the geologic ages, which are marked by different layers of sedimentary rock. Laid down over millions of years, these rock layers contain a permanent record of the Earth's past, including the fossilized remains of plants and animals buried when the sediments were formed. (P.s i read abt this in science not long ago but this is also sourced from nationalgeographic.com so it should be correct.)

Hope this helps.

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What volume of water is needed for 0.196 mol of CdCl2 to prepare a 3.91 M solution? L
Brilliant_brown [7]

0.050 litres of the water will be required to make a 3.91 M solution with 0.196 moles in it.

Explanation:

Data given:

moles of CdCl_{2} = 0.196 Moles

Molarity of the solution = 3.91 M

Volume in litres =?

molarity is calculated by the formula:

molarity = \frac{number of moles}{volume in litres}

putting the values in the above formula and rearranging it for volume:

volume = \frac{number of moles}{molarity}

volume = \frac{0.196}{3.91}

volume = 0.050 litres

0.050 litres of the water will be required to make a 3.91 M solution with 0.196 moles in it.

Molarity is the number of moles present in a given volume of solution which is given in litres. It is the measurement of the concentration of particular solute in a solution.

4 0
3 years ago
Which law states that, in chemical reactions, the total mass of reactants must equal the total mass of the products?
WARRIOR [948]

Answer:

Conservation of mass

Explanation:

The Conservation of mass states that.

8 0
3 years ago
How many moles of CO2 are produced when 1 mole wax C31H64 is burned?<br><br> 31 32 64 or 47
Lana71 [14]

Answer:

31 moles

Explanation:

The balanced combustion reaction of the wax, C_{31}H_{64} is shown below as:

C_{31}H_{64}+47O_2\rightarrow 31CO_2+32H_2O

As seen from the reaction,

1 mole of wax, C_{31}H_{64} on combustion produces 31 moles of carbon dioxide, CO_2

<u>Hence, moles of CO_2 when 1 mole of wax, C_{31}H_{64} is burnt = 31 moles</u>

4 0
3 years ago
Read 2 more answers
An atom that has lost or gained electrons is known as an ion. Which compound below is made up of ions?
elixir [45]

Answer:

Need more information

Explanation:

3 0
3 years ago
Identify the rate-determining step. Question 6 options: always the second step always the last step the fast step the faster ste
marin [14]

The rate determining step in a reaction is the slowest step in the reaction.

<h3>What is the rate determining step?</h3>

Thee term rate determining step is used to describe the slowest step in a reaction. This reaction determines the overall rate of the entire reaction.

Hence, in this case, the rate determining step in a reaction is the slowest step in the reaction.

Learn more about rate determining step:brainly.com/question/12663878

#SPJ1

8 0
2 years ago
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