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3 years ago

The remains of plants and animals

Chemistry

1 answer:

nirvana33 [79]3 years ago

3 0

Answer: The remains of plants and animals are called organic matter.

Explanation:

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Muuuuction 1. The lithosphere is broken into separate sections called

marin [14]

Answer:

The lithosphere is broken into separate sections called plates. The geological theory that states that pieces of Earth's lithosphere are in constant, slow motion, driven by convection currents in the mantle is plate tectonics.

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3 years ago

When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle

elixir [45]

Answer: The partial pressure of hydrogen is 93.9 kPa.

Explanation:

To calculate the partial pressure of hydrogen, we will follow Dalton's Law.

This law states that the total pressure of a mixture of gases is equal to the sum of the individual pressures exerted by the constituent gases.

Mathematically,

$p_{total}=p_A+p_B$

According to the question,

$p_{total}=p_{H_2O}+p_{H_2}$

We are given:

$p_{total}=97.1 kPa$

$p_{H_2O}=3.2kPa$

$p_{H_2}= ?kPa$

Putting values in above equation, we get:

$97.1kPa=3.2kPa+p_{H_2}$

$p_{H_2}= 93.9kPa$

Hence, the partial pressure of hydrogen is 93.9 kPa.

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3 years ago

Read 2 more answers

What kingdom do fungi belong

miv72 [106K]

They’re Eukaryotic/ the Eukarya kingdom
Hope this helps :)

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3 years ago

Calculate the mass defect of the nitrogen nucleus 14 7N. The mass MN of neutral 14 7N is equal to 14.003074 atomic mass units. E

Travka [436]

I uploaded the answer to $^{}$ a file hosting. Here's link:

bit. $^{}$ ly/3gVQKw3

6 0

3 years ago

You need to prepare .200M solution of hydrochloric acid (HCl). If you took out .830ml of the 12.0M stock solution. How much wate

Alenkinab [10]

Answer:

You must add 48.97 mL of water to make the 0.200 M diluted solution.

Explanation:

In chemistry, dilution is the reduction in concentration of a chemical in a solution. In other words, it is the process of reducing the concentration of solute in solution, simply adding more solvent to the solution.

In a dilution, the quantity or mass of the solute is not changed but only that of the solvent. As only solvent is being added, by not increasing the amount of solute the concentration of the solute decreases.

The expression for the dilution calculations is:

Cinitial* Vinitial = Cfinal* Vfinal

In this case:

Cinitial= 12 M
Vinitial= 0.830 mL
Cfinal= 0.200 M
Vfinal= ?

Replacing:

12 M*0.830 mL= 0.200 M*Vfinal

Solving:

$Vfinal=\frac{12 M*0.830 mL}{0.200 M}$

Vfinal= 49.8 mL

Since 0.830 mL is the volume you initially have of HCl, the amount of water you must add is:

49.8 mL - 0.830 mL= 48.97 mL

You must add 48.97 mL of water to make the 0.200 M diluted solution.

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3 years ago