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Mamont248 [21]
3 years ago
10

What are the most chemically stable elements (in terms of reactivity) on the periodic table?

Chemistry
1 answer:
blondinia [14]3 years ago
7 0
<span>Fluorine is the most chemically reactive element on the periodic table, and there are no chemical substances that are capable of freeing it from its bonds.

</span>
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Which of these describes an exothermic reaction?
Paul [167]

A nswer: -

C. Energy is released by the reaction

Explanation:-

An exothermic reaction is one in which during the progress of the reaction heat is evolved.

So energy is released by the reaction.

It cannot be created as energy is neither created nor destroyed as per the Law of conservation of energy. Energy is not transferred either.

The energy released during the progress of the reaction originates from the chemical bonds of the reactants as they break during their conversion into products.

3 0
3 years ago
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In a chemical compound, would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? Why?
Soloha48 [4]

I know what you're asking but I don't think the question is stated properly. Technically, an atom will not join with an "oxide" ion; i.e., the oxide ion is an atom of oxygen to which two electrons have been added. An oxide ion will add to 2 K ions or 1 Ca ion. The K ion has lost just one electron so it takes two of them to equal the 2- charge on the oxide ion whereas the Ca ion has lost two electrons and it takes only one of them to equal the charge on the oxide ion.

4 0
3 years ago
I will give you Brainly if you awser correct if your gonna awser for points pl put I don’t know
gizmo_the_mogwai [7]

Answer:

C

Explanation:

6 0
3 years ago
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Calculating molarity using solute moles A chemist prepares a solution of sodium chloride (NaCl) by measuring out 6.89 mol of sod
hram777 [196]

Answer: Concentration of the chemist's sodium chloride solution is 34.4 mol/L.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

V_s = volume of solution in ml

Given : moles of NaCl = 6.89

volume of solution = 200 ml

Putting in the values we get:

Molarity=\frac{6.89\times 1000}{200}=34.4mol/L

Thus the concentration of the chemist's sodium chloride solution is 34.4 mol/L.

7 0
3 years ago
What information does not need to be included a chemical waste label? Select one: Relative amounts of chemical compounds in the
Helga [31]

Answer:

A description of the experiment the chemicals were used for.

Explanation:

A chemical waste label is required to provide information about any hazardous waste present in the container. Some details are mandatory to mention of the chemical waste label to prevent any accident while doing the experiment, that includes:

  • Chemical compound's name present in the container.
  • Composition and physical state of the waste.
  • Hazardous properties of the waste.
  • The date of manufacturing.
  • Amount of chemical compounds filled in the container.

A chemical waste label does not mention or describe the experiment for which the chemicals were used for, scientists, teacher or students should have knowledge of the chemical composition by reading their names and evaluate themselves on which chemical should be used for which experiment.

Hence, the correct answer is  "A description of the experiment the chemicals were used for."

5 0
3 years ago
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