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

Which one of the following statements about ∝ particles is NOT true?

If the relative atomic mass (RAM) = 1 for hydrogen and 16 for oxygen, the formula mass for H₂O₂ is:

You look through a microscope to view the Brownian motion of smoke in a container of air. Which one of the following statements is NOT true?

The number of kilos in 1 metric tonne is:

Tooth decay can be caused by:

The number 32747 written to 4 significant figures is

The alcohol in beer and spirits is called:

After a 10% discount, an article is sold for $360. The price before the discount was

In the equation, carbon monoxide + oxygen → carbon dioxide, a reactant is:

All of these are ordered crystalline structures EXCEPT for:

The following figures are taken from a manufacturing account.


The cost of tie year's production of finished goods is

The range of values of v when 5 - v ≤ 2v - 1 is

Which of the following statements about photosynthesis is NOT true?

In pea plant size, tall is dominant to dwarf.You cannot tell whether a tall plant is homozygous (TT) or heterozygous (Tt).To find its genotype you perform a test cross.This involves:

The pH scale runs from 1 to:

The speed of a dot-matrix printer is measured by the number of __________ that it can print.

Which one of the following structures is responsible for controlling entry and exit of materials into and out of the cell?

In an airport, a system consisting of sensors, bar code readers and remote controls is MOST LIKELY used for __________.