Calculate the volume of oxygen required for the complete combustion of 20 cm3 of methane[CH4(g) + 2O2 → CO2(g) +2H2O(g)].

Thus, the Volume of oxygen used is 40 cm3

Q1 of 40 Page 130

Calculate the volume of oxygen required for the complete combustion of 20 cm³ of methane[CH_4(g) + 2O₂ → CO_2(g) +2H₂O_(g)].

Thus, the Volume of oxygen used is 40 cm³

Draw the structure of oxygen and sulphur atoms.

Calculate the number of neutrons, protons and electrons (i) atomic number 3 and mass number 7 (ii) atomic number 92 and mass number238.

A metal combines with oxygen to form two oxides having the following composition

i) 0.398 gram of metal oxide I contains 0.318 gram of metal

ii) 0.716 gram of metal oxide II contains 0.636 gram of metal. So that the above data agrees with the law of multiple proportions.

Calculate the mass of a proton, given its charge = + 1.60 × 10⁻¹⁹ C

charge / mass = 9.58 × 10⁷ C kg⁻¹

Questions · 40

5. Atomic Structure

1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 1 1 1 1 1 1 2 3 4 5 1 2 3 4 5 1 2 3 1 2 3 1 2 3