2001 - JAMB Chemistry Past Questions and Answers - page 1
25cm3 of a gas X contains Z molecules at 15oC and 75 mmHg. How many molecules will 25 cm3 of another gas Y contain at the same temperature and pressure?
What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?
[H = 1, O = 16]
A particle that contains 9 protons, 10 neutrons and 10 electrons is a
Cancerous growths are cured by exposure to
An oxide XO2 has a vapour density of 32. What is the atomic mass of X?
Millikan's contributions to the development of atomic theory is the determination of
Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal?
An elements X with relative atomic mass 16.2 contains two isotopes 168X with relative abundance of 90% and m8X with relative abundance of 10%. The value of m is
Which of the following statements is correct about the average kinetic energy of the molecules of a gas?
The pollution from petroleum spillage in rivers and lakes can best be dispersed by