NCERT Class-9 Science Solutions: Chapter 3-Atoms And Molecules Part 6

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Long Answer Questions

Question 24:

Verify by calculating that

  1. 5 moles of and 5 moles of do not have the same mass.

  2. of calcium and magnesium elements have a mole ratio of .

Answer:

Question 25:

Find the ratio by mass of the combining elements in the following compounds.

Answer:

The Ratio by Mass of the Combining Elements
the ratio by mass of the combining elements

A.

B.

C.

D.

E.

F.

Question 26:

Calcium chloride when dissolved in water dissociates into its ions according to the following equation.

Calculate the number of ions obtained from when of it is dissolved in water.

Answer: