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…

Simplify: Answer: 8) F Break the problem into smaller parts 1st step:  x² (1 – 16x²) = x² – 16x⁴ 2nd step:  2x³ (4x – 1) = 8x⁴ – 2x³…

7 The diagram shows three appropriate meters, P, Q and R, connected in the conventional way in a circuit. The switch is initially open. The switch is now closed. What…

The following reaction is at equilibrium: 2R(g) + 3S(g)  2T(g)      llH is negative which conditions (A-E) would produce most of the product T? Answer: 6) B In order to produce…

The action of which enzyme(s) could decrease the pH of a mixture of carbohydrate, protein and lipid? Answer: 5) F A logical way of solving this question is to identify…

Answer: 4) A Substitute the values given in the problem 4.6 x 10⁷ + 7 (2 x 10⁶)4.6 x 10⁷ – 2 (2 x 10⁶) (4.6 x 10⁷) + (14…

Microwave, X-ray and infra-red radiation can all damage living tissues. Which of the following statements correctly explain why this damage occurs? Microwaves cause damage because they are absorbed by water…

The following chemicals are mixed together. In which of the mixtures will a displacement reaction occur? Pb(N03)(aq) + Al(s) 2KCl(aq) + 2F-(aq) Al2(S04)3(aq) + 3Fe(s) CuS04(aq) + Zn(s) Answer: 2)…