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An industrial-strength pipe cleaner has a molarity (M) of 7.0 M in a 0.60 liter container. To be safely used on the pipes in a home, the
molarity is decreased to 2.5 M. What is the solution's new volume?

5.0 M

Explanation:

Molarity = (number of moles of that substance) / (Volume of solution in litres)

7= (number of moles of HCl) / 0.05

Thus,

Number of moles of HCl = 7 x 0.05 = 0.35

The number of moles of HCl will remain unchanged.

Now, for new solution,

0.35 = 0.35 / (New volume of solution in litres)

Thus,

New volume = 1 litre

Thus, amount of water added = 1- 0.05 litre = 5.0 M

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.