How many moles of naci are in 250.0 ml of a 0.35 m nacl solution?

The number of moles of NaCl in the solution are 0.0875 moles.

Explanation:

To calculate the number of moles of NaCl, we use the equation that is used to calculate molarity, which is:

We are given:

Molarity of NaCl solution = 0.35 mol/L

Volume of solution = 250 mL = 0.250 L      (Conversion factor:  1L = 1000 mL)

Putting values in above equation, we get:

Hence, the number of moles of NaCl in the solution are 0.0875 moles.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e