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3 years ago

When an atom loses a valence electron, it becomes a(n) _____________ ion.

Chemistry

1 answer:

Viktor [21]3 years ago

8 0

Answer:

A) Positive

Explanation:

Let's start with a term, atom. An atom is an important piece of matter that consists of three subatomic particles: protons, neutrons and electrons. An atom is neutral because because the number of protons equals the number of electrons. So what would happen if you gained or lost an electron. That atom would turn into an ion since it now has a charge. So if an atom loses an electron, there are more protons than electrons making it a positive ion. Similarly, if an atom gains an electron, then the electrons outnumber the protons, making it a negative ion. In this case, since the atom loses a valence electron, we end up with a positive ion.

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Answer for this question

OlgaM077 [116]

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3 years ago

A chemist makes of magnesium fluoride working solution by adding distilled water to of a stock solution of magnesium fluoride in

mojhsa [17]

The question is incomplete, here is the complete question:

A chemist makes 600. mL of magnesium fluoride working solution by adding distilled water to 230. mL of a stock solution of 0.00154 mol/L magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

<u>Answer:</u> The concentration of chemist's working solution is $5.90\times 10^{-4}M$

<u>Explanation:</u>

To calculate the molarity of the diluted solution (chemist's working solution), we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the stock magnesium fluoride solution

$M_2\text{ and }V_2$ are the molarity and volume of chemist's magnesium fluoride solution

We are given:

$M_1=0.00154M\\V_1=230mL\\M_2=?M\\V_2=600mL$

Putting values in above equation, we get:

$0.00154\times 230=M_2\times 600\\\\M_2=\frac{0.00154\times 230}{600}=5.90\times 10^{-4}M$

Hence, the concentration of chemist's working solution is $5.90\times 10^{-4}M$

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3 years ago

Substances dissolved in a solvent are correctly known as what?

KatRina [158]

Answer:

solute

Explanation:

The substance that dissolves is called the solute. The substance that dissolves it is called the solvent.

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likoan [24]

Answer:

BBB

Explanation:

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3 years ago

Read 2 more answers

A possible mechanism for the overall reaction represented above is the following.

Phantasy [73]

Answer:

Explanation:

The slow step of the reaction is the rate determining step. This means to get the rate law for a chemical activity with slow and fast steps, we have to consider the slow step if we are to write the rate law successfully.

Since the compound NO is reacting with itself, we have to raise the value of the concentration in the square bracket by 2. That is why we have the concentration squared.

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3 years ago