Which type(s) of UV penetrate(s) the atmosphere most?
Consider the following species:
Which statement best describes the boiling points within a homologous series?
How much oxygen gas is required for the complete combustion of 1.0 mol ethane?
Which of the following can be used to detect radiation?
What will be the pH of a solution prepared by mixing 10.0 mL of a 0.200 mol L-1 hydrochloric acid and 5.00 mL of 0.120 mol L-1 barium hydroxide solutions and diluting the mixture to 100.0 mL?
Four samples of river and ocean water from different areas are tested and the results tabulated. Which of the samples is from a polluted ocean beach?
Which statement best defines the term “specific heat capacity” of a pure substance?
Examine the table on the particle removal range of various filters
The natural indicator, H2Z , exhibits several colours as the pH changes. This may be explained by the stepwise ionization of H2Z shown by the equations and the subsequent mixing of coloured ions at particular pH values.
Why is ethanol used as a major constituent of perfumes?
Given the following reactions:
A 250 mL sample of rainwater is titrated using 0.0095 mol L-1 sodium hydroxide solution. If 8.30 mL of the sodium hydroxide solution was required to reach the endpoint, what was the pH of the rainwater?
Which of the following reactions is a redox reaction?
Which of the following is least stable in the atmosphere?