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3 years ago

What is lonization Energy?

Chemistry

1 answer:

PIT_PIT [208]3 years ago

5 0

Answer:

The minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule. Pls mark as breinlest

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One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(II) carbonate,

alexgriva [62]

The question is incomplete, here is the complete question:

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(II) carbonate, in concentrated sulfuric acid. The sulfuric acid reacts with the copper(II) carbonate to produce a blue solution of copper(II) sulfate. Scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction:

Fe(s) + CuSO4 (aq) → Cu(s) + FeSO4 (aq)

Suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. He adds powdered iron to a 200.mL copper(II) sulfate sample from the plant until no more copper will precipitate. He then washes, dries, and weighs the precipitate, and finds that it has a mass of 95.mg

Calculate the original concentration of copper(II) sulfate in the sample. Round your answer to 2 significant digits.

<u>Answer:</u> The concentration of copper sulfate in the sample is 0.0075 M

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of copper = 95 mg = 0.095 g (Conversion factor: 1 g = 1000 mg)

Molar mass of copper = 63.55 g/mol

Putting values in above equation, we get:

$\text{Moles of copper}=\frac{0.095g}{63.55g/mol}=0.0015mol$

The given chemical equation follows:

$Fe(s)+CuSO_4(aq.)\rightarrow Cu(s)+FeSO_4(aq.)$

By Stoichiometry of the reaction:

1 mole of copper is formed by 1 mole of copper sulfate

So, 0.0015 moles of copper will be formed by = $\frac{1}{1}\times 0.0015mol=0.0015mol$ of copper sulfate

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

Moles of copper sulfate = 0.0015 moles

Volume of solution = 200 mL

Putting values in above equation, we get:

$\text{Molarity of the solution}=\frac{0.0015\times 1000}{200}=0.0075M$

Hence, the concentration of copper sulfate in the sample is 0.0075 M

7 0

3 years ago

Which of the following is true about a spontaneous process? it releases energy, it does not require any external action to begi,

ra1l [238]

Answer: Option (b) is the correct answer.

Explanation:

A spontaneous reaction is defined as the process which tends to occur on its own. It does not require any external factor or force in order to start itself.

For example, when we dissolve KCl in water then potassium chloride being ionic in nature will dissolve on its own. Hence, it will be a spontaneous process.

And, a non-spontaneous reaction is defined as a process for the completion of which we have to provide certain conditions.

Thus, we can conclude that the statement it does not require any external action to begin, is true about a spontaneous process.

3 0

4 years ago

Please help!!! Whoever answers first or has a good answer will be marked Brainiest Answer

Goshia [24]

Explanation:

Its ok you got this. Grab a calculator, divide the first number by the second number for each problem. And then bam, density.

8 0

3 years ago

What is the concentration of hplus ions at a ph=11

enyata [817]

Answer: 10^-11

Explanation:

to find the concentration of H+ ions given the ph, we use the formula 10^(-pH).

so 10^-11

7 0

3 years ago

Pleas help me!

xeze [42]

Answer:

Explanation:

Question 1:

atomic number/number of protons

All atoms of the same element share the same number of protons or atomic numbers. In grouping elements on the periodic table, the periodic law is often used. The modern periodic law states that "properties of elements are a periodic function of their atomic number". The atomic number of an element distinguish it from others.

Question 2:

The two carbon atoms would be quite different as they are isotopes. Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.

Naturally, carbon exists in two isotopic forms:

¹³₆C and ¹⁴₆C

One might see these different samples in a rock and in the skin cells. They are simply isotopes. Isotopes have the same electronic configuration and hence similar chemical properties. Only their masses differ.

4 0

4 years ago

Read 2 more answers