Chemistry Past Questions and Answers

There are basic particles from which matter called be made except

The energy value of petrol can be determined by

What volume of 0.5mldm³ H₂SO₄ will exactly neutralize 20cm³ of 0.1moldm³ NaOH Solution?

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, Find the molecular formula [H = 1, C = 12, O = 16)

An oxidation state of Cr in K2CrO7