Which statement describes the composition of potassium chlorate, KClO3?(1) The proportion by mass of elements combined in potassium chlorate is fixed.
(2) The proportion by mass of elements combined in potassium chlorate varies.
(3) Potassium chlorate is composed of four elements.
(4) Potassium chlorate is composed of five elements.

Answer:

Molarity is 13,4M

Explanation:

As mole fraction of chloroform is 0,203; mole fraction of acetone will be 1-0,203=0,797

That means that per 100 moles you have 20,3 moles of chloroform and 79,7 moles of acetone.

Using molar mass and density it is possible to know the volume these moles occupy, thus:

Chloroform: 20,3 moles××= 1637mL= 1,637L

Acetone: 79,7 moles××=  5852mL = 5,852L

That means that total volume is 1,637L + 5,852L = 7,489L

As moles are 100, molarity is:

100mol / 7,489L = 13,4M

I hope it helps!

Final answer:

To determine the molarity of the solution, calculate the number of moles of each compound in the solution, and then divide the total moles by the total volume of the solution. Ensure all units are in the appropriate metric system and take into consideration potential effects of molecular interactions on the total volume.

Explanation:

The first step to calculate the molarity of the solution of chloroform (CHCl3) and acetone (C3H6O) is to determine the number of moles of each compound in the solution. The mole fraction is given as 0.203 for chloroform, therefore the mole fraction for acetone will be 0.797 (since the total mole fraction in a solution is equal to 1).

Next, we calculate the mass of each compound with the known densities. Upon performing these calculations, we then utilise the definition of molarity, which is moles of solute per liter of solution. This can be calculated by knowing the total moles and total volume of the solution. Note that we'd convert all units to the appropriate metric system before carrying out these calculations (density in g/mL, molar mass in g/mol, etc.).

It is also important to consider that the mass and volume of each solution component might not be directly additive due to potential molecular interactions between acetone and chloroform.

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The statement that is given from above “Water pollution that washes into storm sewers from many places, such as parking lots and lawns, is known as nonpoint-source pollution” is true. This is difficult to treat as the source may come from different points.

Answer:The answer would be a

Explanation: