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ValentinkaMS [17]

4 years ago

13

Enter an abbreviated electron configuration for magnesium: Express your answer in complete form, in order of increasing energy.

For example, [He]2s22p2 would be entered as [He]2s^22p^2.

2 answers:

stiks02 [169]4 years ago

6 0

Answer:

1s2, 2s2,2p6,3s2

Explanation:

harkovskaia [24]4 years ago

6 0

Answer:

[Ne]3s²

Explanation:

Mg

1s2 2s2 2p6 3s2 or [Ne]3s²

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How is the stability of a nucleus affected by changing the number of nuclear particles?

Svet_ta [14]

Answer:

Greatly affected.

Explanation:

The stability of a nucleus is greatly affected by changing the number of nuclear particles because changing the number of nuclear particles i.e. neutron or proton will leads to change the element. When we change the number of protons in an atom, we will change the atom from one element to a different element. Sometimes, when you add a proton to an element, the element will become radioactive in nature so we can conclude that changing number of nuclear particles impact the stability of nucleus of an atom.

5 0

3 years ago

A scientist tested a series of solutions to determine their pH, and recorded the results in this table.

gavmur [86]

D because strong bases ( and 14 is a strong base ) will make a strong acid neutral

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3 years ago

You conduct an experiment that requires the creation of an ammonia solution. You do this by reacting 50.0 L of nitrogen gas with

ozzi

Answer : The molarity of the resulting ammonia solution is, 0.89 M

Explanation :

The balanced chemical reaction is:

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

First we have to calculate the moles of nitrogen gas.

As we know that at STP, 1 mole of gas occupies 22.4 L volume of gas.

As, 22.4 L volume of nitrogen gas present in 1 moles of nitrogen gas

So, 50.0 L volume of nitrogen gas present in $\frac{50.0}{22.4}=2.23$ moles of nitrogen gas

Thus, the moles of nitrogen gas is 2.23 moles.

Now we have to calculate the moles of ammonia gas.

From the reaction, we conclude that

As, 1 mole of $N_2$ react to give 2 mole of $NH_3$

So, 2.23 moles of $N_2$ react to give $2.23\times 2=4.46$ moles of $NH_3$

Now we have to calculate the molarity of the resulting ammonia solution.

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

$\text{Molarity}=\frac{\text{Moles of ammonia}}{\text{Volume of solution (in L)}}$

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

$\text{Molarity}=\frac{4.46mole}{5.0L}$

$\text{Molarity}=0.89M$

Therefore, the molarity of the resulting ammonia solution is, 0.89 M

7 0

3 years ago

What prevents a plant cell from bursting when it's full of water?

stira [4]

More specifically the cell wall prevents the vacuole from getting to large and making the plant cell burst.

8 0

3 years ago

Which blood protein level increases in the case of primary liver cancer?

PIT_PIT [208]

Answer:

Alpha feto protein AFP

Explanation:

Plasma protein bio marker alpha feto protein is detected by the liver test to determine the presence of liver cancer in a patient.

High levels of alpha feto proteins is also a sign of cancer of ovaries and testicles and also liver non cancerous diseases that is cirrhosis and hepatitis.

The increased levels of two liver enzyme AST and ALT is also indicator of hepatic cancer.

6 0

3 years ago