CHEMISTRY HIGH SCHOOL

Which chemical formula shows a covalent compound?NaCl

HBr


MgO


CO2

Answers

Answer 1
Answer: Covalent compound CO2
Answer 2
Answer:

Answer:

CO2

Explanation:

A covalent compound is a compound between 2 nonmetals.  For this reason, NaCl and MgO can be eliminated since both contain metals.  While neither H nor Br are metals, in HBr H is acting as a metal.  CO2 is the only choice containing both nonmetals, with both elements acting like nonmetals as well.

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Reaction 2 occurs when an excess of 6 M HCI(aq) solution is added to 100. mL of NaOCl(aą) of unknown concentration. If the reaction goes to completion and 0.010 mol of Cl2(g) is produced, then what was the molarity of the NaOCl(aq) solution? (A) 0.0010 M
(B) 0.010 M
(C) 0.10 M
(D) 1.0 M

Answers

The molarity of the NaOCl solution is 0.10M

The correct answer to the question is Option C. 0.10 M

We'll begin by calculating the number of mole of NaOCl required to produce 0.010 mole of Cl₂.This can be obtained as follow:

NaOCl + 2HCl —> Cl₂ + NaCl + H₂O

From the balanced equation above,

1 mole of NaOCl reacted to produce 1 mole of Cl₂.

Therefore

0.010 mole of NaOCl will also react to produce 0.010 mole of Cl₂.

  • Finally,we shall determine the molarity of the NaOCl solution.

Mole of NaOCl = 0.01 mole

Volume = 100 mL = 100 / 1000 = 0.1 L

Molarity of NaOCl =?

Molarity = mole / Volume

Molarity of NaOCl = 0.01 / 0.1

Molarity of NaOCl = 0.1 M

Therefore, the molarity of the NaOCl solution is 0.1 M

Learn more: brainly.com/question/12755239

Answer:

Option C 0.10 M

Explanation:

you are not providing the reaction, but luckily we have data to write the equation. We know that we are taking HCl and NaOCl to produce Cl2, the reaction is as follow:

NaOCl + 2HCl ---------> Cl₂ + NaCl + H₂O

From this reaction, we know that we have excess of acid that is added to 100 mL (0.1 L) of NaOCl, and this produces 0.010 moles of Chlorine.

All we have to do here, is apply stechiometry. We already know that the acid is in excess, so the moles produced would be the moles of the limiting reactant, in this case, the NaOCl.

According to the reaction NaOCl and Cl2 has a mole ratio of 1:1, so the moles of Cl2 would be the same moles that NaOCl lost so:

moles Cl2 = moles NaOCl = 0.010 moles

Then the concentration:

M = 0.010 / 0.1

M = 0.10 M

This is the molarity of NaOCl

4. What parts of Dalton’s atomic theory no longer agree with the current picture of the atom? Provide an answer using 3 – 4 sentences in your own words.

Answers

Since you did not show anypicture, I will be describing Dalton’s atomic theory. The scientist thoughtthat the atom was the smallest particle in the universe is John Dalton. Heestablished five theories relating atoms. One, elements are made of extremelysmall particles called atoms. Two, atoms of different element have differentsizes, mass and physico – chemical properties. Three, atoms cannot be dividedfurther, destroyed or created. It also follows the law of conservation ofenergy. Fourth, atoms can combine to form compounds. And lastly, in chemicalreaction, atoms can be combined, separated or rearranged. 

dalton said that the atom is the smallest particle but now we know that an atom can be divided into electron proton and neutron.

the guy below should be deleted but you cant cause its approved, he didnt even asnwer the question XD

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Answers

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Answers

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Answer:

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Explanation:
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