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Mariana [72]
3 years ago
14

What is the time required for contamination source

Chemistry
1 answer:
Afina-wow [57]3 years ago
8 0
Hi there!

It can take years to remove all of the harmful substances from the water.

I hope my answer helped :)
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Is comets greater than meteoroids
Valentin [98]

Answer:

Comets are greater in size than meteoroids

Explanation:

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2 years ago
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Match the characteristics of each of the substance to their category
hjlf

Answer:

Metal: C, F, G,  

Nonmetal: B, E,  

Metalloid: A, D, H

Explanation:

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2 years ago
An element is a pure substance that is defined by the number of protons in which is defined as the atomic number
Pani-rosa [81]
If this is a true or false question then the answer is true.
8 0
3 years ago
The density of mercury is 13.5g/mL. What is the volume of this liquid if the sample weighs 12.5 pounds?
Mama L [17]

Answer : The volume of liquid is 420 mL.

Explanation :

Density : The mass per unit volume of a substance is known as density.

Formula used:

\text{Density}=\frac{\text{Mass}}{\text{Volume}}

As we are given:

Density of mercury = 13.5 g/mL

Mass = 12.5 pounds

First we have to convert mass of sample from pound to gram.

Conversion used:

As, 1 pound = 453.6 g

So, 12.5 pounds = 453.6 × 12.5 g = 5670 g

Now we have to calculate the volume of liquid.

\text{Density}=\frac{\text{Mass}}{\text{Volume}}

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

13.5g/mL=\frac{5670g}{\text{Volume}}

Volume = 420 mL

Therefore, the volume of liquid is 420 mL.

7 0
3 years ago
Where would the electrons in the 3d sublevel be found? Possibly in any shell only in the n = 3 energy level in energy levels &gt
postnew [5]

Answer:

In the n = 3 energy level

Explanation:

There's is no further explanation for this.

All the electrons in an energy level are distribuited according to the period in the periodic table they are.

So, if we have an atom in period 1, like Hydrogen (H), that atom would only have 1 level energy (n = 1) and in that level, we only have the sub level 1s.

Electrons in the 3d sublevel, are found mostly in all the transition metals of period 3, and it can go from 1 to 10 electrons. To be with the 3d sub level it's neccesary that the energy level to be 3.

energy levels beyond that, like n = 4, we have electrons occupying the 3d sub level, so, primordly, the 3d is found only in energy level 3.

Hope this helps

4 0
2 years ago
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