While actually doing the experiment to compare the dissolved oxygen in several water samples, which controlled variable is the most important?
In the following nuclear reaction, what is the identity of X ?
Consider the following oxidation – reduction reaction:
What is the IUPAC name of the following compound?
Airbags are safety features of modern cars that are designed to reduce the impact on passengers by rapid inflation in the event of a collision.
Expanded polystyrene can be produced by blowing gases through molten polystyrene and then allowing it to cool. A common use of this polystyrene is in the manufacture of protective foam packaging. Which property of polystyrene makes it suitable for this use?
A student needed to compare the strength of the three hypothetical acids H2A, HB and HC . The following suggestions were given by other students.
Given the following reactions of SO2:
Which of the following is important in the nuclear stability of an atom ?
Consider the following pairs of substances:
What is the pH of a mixture of 20.0 mL of 0.102 mol L-1 barium hydroxide solution and 40.0 mL of 0.150 mol L-1 hydrochloric acid diluted to a final volume of 100 mL?
Which list gives the species in the order of decreasing oxidising ability?
A student used the evaporation technique to determine the total dissolved solids in a water sample provided by her teacher.
Which compound has the highest ozone-depleting potential?
A type of polymerisation reaction involves the release of a water molecule. Which monomer is most likely to be involved in this reaction?