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3 years ago

6

How does changing temperature affect the solubility of gases in liquids?

1 answer:

Allisa [31]3 years ago

8 0

Answer:

The solubility of gases in liquids decreases with increasing temperature. Conversely, adding heat to the solution provides thermal energy that overcomes the attractive forces between the gas and the solvent molecules, thereby decreasing the solubility of the gas; pushes the reaction in Equation 4 to the left

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In an experiment, a student made a compund of sulfur and copper, and now she needs to find if the compound is copper (I) sulfide

finlep [7]

<u>Answer:</u> The formula for the given compound is $Cu_2S$

<u>Explanation:</u>

An ionic compound is defined as the compound which is formed when electron gets transferred from one atom to another atom. These are usually formed when a metal reacts with a non-metal.

The chemical formula of copper (I) sulfide is $Cu_2S$ because this is formed by the combination of $Cu^+$ ions and $S^{2-}$ ions

The chemical formula of copper (II) sulfide is $CuS$ because this is formed by the combination of $Cu^{2+}$ ions and $S^{2-}$ ions

To calculate the percent composition of element in a compound, we use the equation:

$\text{Percent composition of element}=\frac{\text{Mass of element}}{\text{Mass of compound}}\times 100$ ...........(1)

<u>For copper (I) sulfide:</u>

Mass of copper = (2 × 63.546) = 127.092 g/mol

Mass of copper (I) sulfide = 159.16 g/mol

Putting values in equation 1, we get:

$\text{Percent composition of copper in }Cu_2S=\frac{127.092g}{159.16g}=79.85\%$

<u>For copper (II) sulfide:</u>

Mass of copper = 63.546 g/mol

Mass of copper (II) sulfide = 95.611 g/mol

Putting values in equation 1, we get:

$\text{Percent composition of copper in CuS}=\frac{63.546g}{95.611g}=66.46\%$

<u>Given compound:</u>

Mass of copper in given compound = 0.8383 grams

Mass of given compound = 1.0440 grams

Putting values in equation 1, we get:

$\text{Percent composition of copper in given compound}=\frac{0.8383g}{1.044g}=80.29\%$

The percent composition of copper is close to the composition in copper (I) sulfide.

Hence, the formula for the given compound is $Cu_2S$

8 0

3 years ago

How many molecules of carbon dioxide are in 388.1 moles

crimeas [40]

Answer:

23

The answer is 53×11×10

7 0

3 years ago

A property of a substance that is the same no matter what size of sample is tested is _____.

KengaRu [80]

Answer:

B.) an intensive property

Explanation:

Bc it is a Characteristic Property that won't change no matter what size of sample is tested

6 0

3 years ago

When a magnet spins within a coil of wires, what is produced?

Andrei [34K]

Decreasing the turns of wire

7 0

2 years ago

4. A handful of sand has a mass of 208 g and displaces a volume of 80.0 mL. Calculate its

DerKrebs [107]

Answer:

<h2>2.6 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question we have

$density = \frac{208}{80} = 2.6 \\$

We have the final answer as

<h3>2.6 g/mL</h3>

Hope this helps you

7 0

3 years ago