In an experiment to investigate the relationship between pressure and temperature ofan enclosed gas, 48 g of oxygen gas was sealed in a container. The results obtainedare recorded in the table below. 4.1 Draw a graph of pressure versus temperature on the attached ANSWERSHEET. Extrapolate the graph so that it intersects the y-axis. (4) 4.2 … Read more
Consider the list of six substances with their formulae and boiling points in the tablebelow. 3.1 Explain why ethanol is soluble in water. Refer to the relative strength of theintermolecular forces in ethanol and water. (3) 3.2 Explain why the boiling point of iodine is higher than that of bromine. Refer tothe intermolecular forces present … Read more
(2) 2.1 Define the term covalent bond. 2.2 Draw Lewis structures for: 2.2.1 CH3Cℓ (2) 2.2.2 CO2 (2) 2.3 How many lone-pair electrons are on the central atom in the CO2 molecule? (1) 2.4 Identify ONE of the substances in Reaction 2 that can form a dative covalentbond when reacting with an acid. (1) 2.5 … Read more
4.1.1 Calculate the missing values A and B respectively in the table. (4) 4.1.2 Which population group has fewer females than males? (2) 4.1.3 Write the total number of white males in words. (2) 4.2.1 What is the difference in the number of seats between the left-hand side andthe right-hand side of the theatre? (4) … Read more
A compound bar graph below represents salaries of six employees in R100’s for twocompanies. Use the graph to answer the questions below. 3.1 Moesha claims that the mean salary of Company A, is R1 000 more than the meansalary of Company B. Verify, with calculations, whether her statement is valid or not. (6) 3.2 What … Read more
Various options are provided as possible answers to the following questions. Eachquestion has only ONE correct answer. Choose the answer and write only theletter (A–D) next to the question number (1.1–1.10) in the ANSWER BOOK, forexample 1.11 E. 1.1 Which ONE of the bonds between the atoms below has the highest polarity? A H – … Read more
2.1 Use TABLE 2 below showing different options with premiums paid and benefits of aninsurance company.TABLE 2 NOTE: Benefits in the table represent money paid out in the event of death for a person 15 years and older Benefits for those younger than 15 years are 75% of the amounts indicated in the table. Premium … Read more
1.1 Mr Brown conducted a survey on the amount of airtime (in rands) EACH students had on his or her cellphone . He summarized the data in the box and whisker diagram below. 1.1.1 Write down the five -number summary of the data. (2) 1.1.2 Determine the interquartile range. (2) 1.1.3 Comment on the skewness … Read more
1.1 If they wash both cars and microbuses from Monday to Friday, calculate theprobability that they will wash a car. (3) 1.2 Sipho claims that if they wash both cars and microbuses from Monday to Sunday,they will be able to receive more than R4 000. With calculations, show whether hisclaim is valid or not. (10) … Read more
The solid in the diagram is made up of a rightprism with square base, and a right pyramid ontop of the prism. The length of the prism is 12cm, the side of the base is 6 cm and the heightof the pyramid is 8 cm. 12.1 Calculate the slant height of the triangular face of … Read more