BMAT 2013 Section 2 Question 18
18 An impure sample of sodium hydroxide has a mass of 1.20 g. All the sodium hydroxide completely reacts with a minimum of 50.0 cm3 of 0.50 mol dm-3 hydrochloric…
18 An impure sample of sodium hydroxide has a mass of 1.20 g. All the sodium hydroxide completely reacts with a minimum of 50.0 cm3 of 0.50 mol dm-3 hydrochloric…
Since Dolly the sheep, many other mammals have also been cloned by somatic cell nuclear transfer. The genetic material from a body cell is inserted into an egg cell that…
Three variables x, y and z are known to be related to each other in the following ways: x is directly proportional to the square of z y is inversely…
Two radioactive sources X and Y have half-lives of 4.8 hours and 8.0 hours respectively. Both decay directly to form only stable isotopes. The activity of a sample of the…
Which one of the following pairs do not have the same electronic structure? Answer: 14) A A – CorrectMg has 2 electrons on its outer shell. Each of these electrons…
Which of the following is not needed in order to genetically engineer bacterial cells to produce a fluorescent protein from a jellyfish? Answer: 13) C This might be a tricky…
The square ABCD is positioned so that its vertices are at the points with coordinates: (1, 1), (-1, 1), (-1, -1) and (1, -1). The square is rotated clockwise through…
The diagrams show two glass blocks in air. For the rays of light shown, the critical angle for the glass/air boundary is 42°. A ray of light is shown approaching…
1.15 g of sodium completely reacts with water at standard temperature and pressure (STP). What volume of hydrogen at STP is produced by this reaction? [Assume in this question that…
In a reflex action in which a person touches a hot plate and pulls their arm away, neurons of different lengths are involved. Which answer identifies the relative lengths of…