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3 years ago

Every chemical compound has a formula, which cannot be altered when balancing chemical equations.

1 answer:

4 0

If I understand the question correctly, I think the answer is true. My reasoning is that each formula for the molecules used in a reaction are set and can't be modified to make it easier to balance or else the reaction would change fundamentally.
an example of this is H₂+1/2O₂⇒H₂O. You can't change the H₂O to H₂O₂ to make the reaction cleaner. Water and hydrogen peroxide are two different chemicals and therefore can't be interchanged with out changing the fundamental qualities of the reaction

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A solution is prepared by adding 91.3 g of sodium bromide [NaBr], to 115. g of water. Determine whether the solution is saturate

MrMuchimi

<u>Answer:</u> The given solution is unsaturated solution

<u>Explanation:</u>

We are given:

Solubility of NaBr = 9.19 m

Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent.

Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.

A precipitate is defined as the insoluble salt which is formed when two solutions are mixed containing soluble substances. The insoluble salt settles down at the bottom of the reaction mixture.

There are three conditions:

When $m_{\text{(calculated)}}$ ; the solution is unsaturated
When $m_{\text{(calculated)}}=m_{\text{(given)}}$ ; the solution is saturated
When $m_{\text{(calculated)}}>m_{\text{(given)}}$ ; precipitate will form

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

$\text{Molality}=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}$

Where,

$m_{solute}$ = Given mass of solute (sodium bromide) = 91.3 g

$M_{solute}$ = Molar mass of solute (sodium bromide) = 103 g/mol

$W_{solvent}$ = Mass of solvent (water) = 115 g

Putting values in above equation, we get:

$\text{Calculated molality of NaBr}=\frac{91.3\times 1000}{103\times 115}\\\\\text{Calculated molality of NaBr}=7.71m$

As, the calculated solubility is less than the given solubility. So, the solution will be unsaturated.

Hence, the given solution is unsaturated solution

5 0

3 years ago

This type of equation is a what reaction?

sergey [27]

Answer:

Decomposition

Explanation:

H2CO3 Breaks down to H2O and CO2

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3 years ago

What measures the energy of a wave?

djyliett [7]

Answer:

ampiltude

Explanation:

Amplitude means a measure of the amount of energy in a wave. Notice in the drawing below how the amplitude measures the height a wave is going above or below the resting position of the wave.

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The price of 1 gallon of gasoline in U.S. dollars in France is $4.87

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Sergio [31]

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