Answer:
Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
When copper chloride is added to water, it dissolves into the water since it is fairly soluble in water. The resulting mixture would be a solution. A solution is an example of a homogeneous mixture where it consists of a solute and a solvent. A homogeneous mixture is a type of mixture where the composition is uniform all throughout the system resulting to uniform properties as well. The opposite case is called an heterogeneous mixture where it consists of several components that are not uniformly distributed. Any point in this mixture would have different composition resulting to different properties in the mixture.
Answer:

Explanation:
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In this case, since the relationship between molecules and mass is first analyzed via the Avogadro's number to compute the moles in the given molecules:

We now use the molar mass of carbon tetrachloride (153.81 g/mol) to obtain the required grams:

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2.07 M is the molarity of the final solution if 45.0 ml of 6.00M HCl is added to 130 ml of
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Explanation:
Data given:
volume of HCl, V1 = 45 ml
molarity of the HCl solution, M1 = 6 M
final volume of the HCl solution after water is added, V2 = 130 ml
final molarity M2 =?
After the dilution, the molarity of the new solution can be found by using the formula:
M1V1 = M2V2
here M1 and V1 are the molarity and volume for concentrated solution, M2 and V2 represents the diluted solution's molarity and volume.
Applying the formula after rearranging the equation, we get
M2 = 
M2 = 
M2 = 2.07 M
The final molarity of the HCl solution is 2.07 M