This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here's the solution to question 5: a) i) An element is a pure substance consisting of only one type of atom and cannot be broken down into simpler substances by chemical means. A compound is a pure substance formed when two or more different elements are chemically bonded together in a fixed ratio. ii) • Elements: Iron filings, Sulphur, Hydrogen • Compounds: Water, Salt • Mixtures: Sea water, Air, Glass b) i) () Temperature: Kelvin (K) () Amount of substance: Mole (mol) () Luminous intensity: Candela (cd) ii) Step 1: Calculate the volume of the block. V = length × width × height V = 5 cm × 3 cm × 2 cm V = 30 cm^3 Step 2: Calculate the density using the formula = (m)/(V). = 270 g30 cm^3 = 9 g/cm^3 The density is 9 g/cm^3. c) i) Three basic life processes are: • Nutrition • Respiration • Reproduction d) Dehorning is the process of removing the horns from livestock, typically cattle, to prevent injuries to other animals or handlers. That's 2 down. 3 left today — send the next one.