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Harlamova29_29 [7]
2 years ago
7

This is the chemical formula of Nitrogen gas.

Chemistry
2 answers:
Archy [21]2 years ago
8 0

Answer:

D

Explanation:

N₂ is not a compound because it is not made up of two or more different elements - it is only made up of nitrogen atoms

Hope this helps!

MariettaO [177]2 years ago
3 0
D is incorrect it is not a compound.
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Type the correct answer in the box. sodium carbonate (na2co3) is sometimes used as a water-softening agent. suppose that a worke
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The mass of dissolved sodium carbonate is 109 g of Na₂CO₃.

<h3>What is a solution ?</h3>

A solution consists of two elements , a solute and a solvent .

A solute is dissolved into solvent to make a solution.

The concentration of a solution is measure by Molarity , Molality , mass% etc.

It is given in the question that

sodium carbonate ( Na₂CO₃) is sometimes used as a water-softening agent

a worker prepares a 0.724 m solution of  Na₂CO₃ and water.

the volume of the solution is 1.421 liters.

Mass of dissolved sodium carbonate is grams =?

Concentration = 0.724 M

Volume = 1.421 liters

Molecular mass of  Na₂CO₃  = 106 g

The mass of the solute needs to be determined

Molarity = moles / volume\

moles = Molarity x volume

Substituting the values

moles = 0.724 x 1.421

moles = 1.029

1 mol of Na₂CO₃ means  106 gm of  Na₂CO₃

Then 1.029 moles will mean 1.029 * 106

109.07 gm

Therefore , the mass of dissolved sodium carbonate is 109 grams.

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7 0
2 years ago
You are comparing a reaction that produces a chemical
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If the reaction is a chemical change, new substances with different properties and identities are formed. This may be indicated by the production of an odor, a change in color or energy, or the formation of a solid.

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3 years ago
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What type of igneous rock is cooled and solidified above ground?
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Answer:

\large \boxed{\text{0.180 mol/kg }}

Explanation:

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3. Molal concentration

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3 years ago
Atoms of two different elements must have different____
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