Chemistry ASC Exam fully solved & updated

distribution - ANSWER-means different far apart and moving at a distribution of speeds - ANSWER-which statement best descries molecules in the gas stage attraction between water molecules are broken as gas escapes - ANSWER-which is true of water that has been boiling for 20 minutes water has stronger intermolecular forces than methane - ANSWER-one mole of water has a mas of 18 grams and one mole of methane gas has 16 grams. At room temperature water if found in the liquid state and methane in the gas state gas particles are much smaller than the distances between them - ANSWER-which statement explains why a gas sample can be compressed into a small container take up less space than the molecules of liquid water - ANSWER-at the molecular level, why does solid water (ice) float in liquid water it breaks up into individual molecules - ANSWER-when glucose is placed in water... PCl3 - ANSWER-Phosphorus trichloride is a reagents for the conversion of alcohols to alkyl chlorides. It will also convert carboxylic acids to acid chlorides (acyl chlorides) Oxygen to ozone - ANSWER-which is a chemical change because a new substance is formed partial pressure of helium - ANSWER-what has doubled copper because it has less density than mercury - ANSWER-which metal will float if placed in mercury at room temperature sodium nitrate because it is lighter - ANSWER-for $50/kilogram, one can either purchase KNO3 or NaNO3 trigonal pyramidal - ANSWER-what is the molecular shape of a molecule which has one non-bonding shape and three bonding pairs because nitrogen cannot form 5 bonds - ANSWER-why is the purposed lewis-dot structure unacceptable answer B; heat leaving the system into the surroundings - ANSWER-which statement best describes an exothermic reaction answer B; the mass will remain the same but the number of molecules/products will change - ANSWER-will give you a chemical reaction about a sealed container answer D; need more molecules of x than we do on y - ANSWER-2x + Y = X2Y (an unknown is formed with this reaction?) answer A; freezing water to make ice cubes - ANSWER-define exothermic process answer C; kinetic energy is transferred through collisions with the water molecules - ANSWER-a hot piece of copper metal is placed into cold water. how is the water warm graph B (an increase in calcium sulfide and then a constant); different masses of calcium react with the same mass of sulfur - ANSWER-which graph depicts the relationship between calcium and calcium sulfide when you add more calcium H2Se same valence electrons - ANSWER-the formula for hydrogen sulfide is H2S. Which choice best describes hydrogen selenium answer A; atomic spectra are line spectra - ANSWER-what evidence supports the theory that the energies of electrons of atoms are quantized answer D; sulfur - ANSWER-using the graph, determine the ionization energy for which element answer B; will give you a series of elements and ask "which correctly orders the species from smaller to larger" (right to left) - ANSWER-going from left to right, what happens to the radius of an element answer D; trigonal pyramidal - ANSWER-what is the molecular shape/geometry of a molecule which has one lone pair (non-bonding) and three atoms which are bonded to the central atom answer A; calculate the difference of the different bond lengths - ANSWER-resonance structures for the ion (will give you structures and lengths of bonds) between 104-109 - ANSWER-what is the approximate bond angel surrounding the O2 atoms in hydrogen peroxide answer C; Sp3 - ANSWER-what is the hybridization of the oxygen indicated because nitrogen cannot form 5 bonds (2) - ANSWER-why is the lewis structure for N2H4 uncacceptable answer B; Ca2 + NO3 - ANSWER-in addition to water, what are the major species in the solution of Ca(NO3)2 answer D; not enough water is available to disassociate all of the sodium nitrate - ANSWER-suppose a student has a saturated aqueous solution of sodium nitrate as the water evaporated at constant temperature solid sodium nitrate precipitates out because... Answer A - ANSWER-which represents substance in a solid phase (gives a phase change diagram) answer A and C - ANSWER-same X is a 20g cylinder that barely floats in water, what other cylinder will sink in water answer B; average speed of the molecule in x is slower than Z - ANSWER-the containers below are at same temperature and have equal volumes. container X is filled with N2 +Cl2 container Z is filled with N2 which statement is correct answer C; the number of atoms in the reactants equals the number of atoms in the products - ANSWER-when a chemical equation is balanced, which statement is always true answer D; 20 single atoms and 5 diatomic - ANSWER-if an atom and diatomic element react to form H2O, which set of reactants would produce 10 molecules with no excess answer A; HNO3 - ANSWER-beaker 1 shows a mixture of solid PbF2 with additional HNO3 to beaker 1 and causes a change in beaker 2. what is the limiting reactant answer D; N = 5 to N = 4 - ANSWER-which energy level transitions for a hydrogen atom would emit the photon with lowest frequency answer C; potassium - ANSWER-element M reacts with sulfur to form an ionic compound with formula M2S. Element M is more reactive than Na in a similar reaction and the smaller radius than Rubidium. the element is... answer C; molecule a is polar, molecule b is non-polar - ANSWER-consider the geometry of the molecules who lewis structures are shown. Which statement is true