1 mole of gas occupies 24 litres at room temperature and pressure, so the number of moles in
72 litres is:

In an ecosystem a population is:

Particles are furthest apart in:

In the figure above, for which point is the x-coordinate positive and the y-coordinate negative?

75 g of freshly dug soil was placed in an oven at 105 ℃ for 24 hours. It was allowed to cool, then reweighed. If the final mass of the dry soil was 66 g, what was the % water content of the original soil sample?

When two solutions are mixed and give a solid product we call it:

The following are all natural materials EXCEPT for:

If p * q = pq² , then 2 * 3 =

Plants make growth movements in response to all of the following stimuli EXCEPT for:

A typical soil contains mineral particles, humus, water, air and:

John Jones pays his employees by cash. How will he record this payment in his books?

Water passes out of leaves through the:

The only one of the following which is NOT a change of state is:

The density of pure water is:

If a reaction takes 50 seconds at 25 ℃, then at 50 ℃ the time for the reaction in seconds is likely to be about:

A trader received an invoice for $4,000 less 25% trade discount. Subsequently he returned one eighth of the goods. What amount would be entered in his Returns Outwards Account?

A boy throws a cricket ball straight up in the air. At the very top of its flight:

The Item refer to the information below The following scores were obtained by eleven footballers in a goal-shoot competition:

The median score was

When testing a leaf for the presence of starch, the correct sequence of procedures is:

Compared to industrialised countries, developing countries: