Question

30) — 30) A barometer measures A) the difference in pressure between a gas sample and atmospheric pressure. B) the pressure of a gas sample in a container. C) atmospheric pressure. D) the pressure of an ideal gas. E) the difference in pressure between two gas samples. 31) 31) Which one of the following substances, with their structures shown, will NOT display hydrogen bonding? B C.HO D . ethanol E. diethyl ether A. NH, H-N- H HF -E: H H-C-H H-C- HO: CC DD E)E B)B A)A 32) Surface tension A) is unaffected by temperature. B) is the same as viscosity. C) increases with increasing temperature. D) is lowered by surfactants. E) is higher for nonpolar substances than for polar ones. 33) 33) Which of the following statements contlicts with the kinetic molecular theory of gases? A) The average kinetic energy of the gas particles is proportional to the absolute temperature B) Gas particles lose energy only when they collide with the walls of the container C) Gas particles are in constant, random motion D) There are no forces between gas particles E) Gas particles occupy a negligible volume compared with the volume of their container 34) 34) A sample of sulfur contains 1.81 104 atoms of sulfur. How many moles of sulfur does this represent? A) 0.333 mol B) 1.77 mol C) 1.81 mol D) 1.09 mol E) 3.01 mol

Answer 1

ans A barometer is an instrument used to measure atmospheric pressure, Option (C) es correct

Answer 2

c is the correct option

Answer 3

c is the correct option