Fundamentals of chemistry

Class 9 · Chemistry · 6 questions

Name: ____________________   Date: ____________

1. What is the relative atomic mass of oxygen?

   • A 16
   • B 2
   • C 32
   • D 8

2. How many atoms are present in one molecule of H2SO4?

   • A 3
   • B 9
   • C 5
   • D 7

3. What is the mass of one mole of water, H2O? (H = 1, O = 16)

   • A 20 g
   • B 18 g
   • C 34 g
   • D 16 g

4. The number of particles in one mole of any substance is:

   • A 3.01 x 10^23
   • B 1.2 x 10^24
   • C 6.02 x 10^22
   • D 6.02 x 10^23

5. A substance made of only one kind of atom is called:

   • A A solution
   • B A mixture
   • C An element
   • D A compound

6. How many moles are there in 36 g of water? (molar mass 18 g/mol)

   • A 3
   • B 2
   • C 0.5
   • D 1