To electrolyse solid lead bromide it must first be heated so that:

A and B had a partnership and shared profits and losses 2/3 and 1/3 respectively. They admitted C to the partnership. In addition to capital, C had to pay goodwill $3,600. How much did A and B receive as their respective share of Goodwill?

Active transport:

The table shows the distribution of the ages of 25 students.

What is the probability that a student chosen at random is AT LEAST 13 years old?

In many Caribbean countries the Queen of England is the head of state.

Such countries may be described as

A political campaign is a method used by political parties to

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

In the figure above, the shaded portion represents

All of the following have a charge of -1 EXCEPT for:

Eight bits are called a __________.

All the following are special purpose software EXCEPT

To complete the reaction: acid + carbonate → salt + carbon dioxide + ?, we must add the word:

1 mole of sodium carbonate weighs 106 g, so the number of moles in 318 g will be:

The area of the trapezium ABCD above is

The interest rate on investments in a bank decreased from 8 ¹/₂ per cent per annum to 6 per cent per annum. The difference in annual interest on a deposit of $2 000 is

In the rectangle above, if ∠AEB = 80°, then ∠DAC =

Cooking food improves all of these EXCEPT for:

If U = {1, 2, 3, . . . 10 } and S = { 2, 4, 6, 8, 10 }, then S ' =

We use expanded polystyrene cups for heat of reaction experiments because the cups are:

Which one of the following is a biological component of a pond ecosystem?