Explain why compounds formed from non-metals normally do not conduct electricity and have a relatively low boiling point?
State the chemical reagent you would use to test for the presence of Carbon Dioxide in the laboratory and give its chemical formulae
Explain in molecular terms how the rate of reaction is affected by changing the concentrations of reactants
Why is Sulfur Dioxide described as an acidic gas?
In a sample of 100 atoms of Boron, there are 20 atoms of Boron – 10 and 80 atoms of Boron – 11. (i) Explain why these two forms of Boron are isotopes? (ii) Calculate the relative atomic mass of
Explain, in terms of their structure and bonding, why the melting points of Calcium Fluoride (CaF2 1418°C) and Phosphorus Trifluoride (PF3 -151°C) are so different?
Describe what happens to the temperature when a change of state from liquid to gas is taking place. Explain.
What method(s) of analysis do we use to determine the purity of the substance?
Describe the differences, in terms of the motion and arrangement between solid, liquid and gaseous particles.
At room temperature iron will rust in moist air. Describe and explain how galvanizing iron prevents rusting.