A) Oxygen and hydrogen B) Nitrogen and oxygen C) Carbon and oxygen D) Sulphur and oxygen
A) XY2 B) X2Y3 C) X3Y2 D) X2Y
A) 8 and 2 B) 1 and 3 C) 2 and 3 D) 6 and 2
A) Crystallisation B) Evaporation C) Sublimation D) Melting
A) NH3 B) NaCl C) CO2 D) H2O
A) Water B) Iron C) Sodium chloride D) Carbon dioxide
A) Ethanol (C2H5OH) B) Methane (CH4) C) Carbon dioxide (CO2) D) Ammonia (NH3)
A) Have strong intermolecular forces of attraction B) Have negligible volume compared to the space they occupy C) Are closely packed together D) Have fixed positions in a lattice structure
A) Have particles that are highly compressed and far apart B) Have particles that are closely packed together and vibrate in fixed positions C) Have particles that are far apart and moving randomly D) Have particles that are highly compressed and free to move
A) Rusting of iron B) Burning of wood C) Digestion of food D) Melting of ice
A) Boyle's law and Charles's law B) Boyle's law, Charles's law, and Avogadro's law C) Charles's law and Avogadro's law D) Boyle's law and Avogadro's law
A) PV = RT B) PV = nT C) PV = nRT D) P = V/nRT
A) Volume B) Atomic mass C) Number of moles D) Density
A) Helium B) Chlorine C) Sodium D) Oxygen
A) They are constantly in motion. B) They occupy a significant volume. C) They have specific shapes. D) They attract each other strongly
A) wood and oxygen is less than the mass of the products. B) wood and oxygen is greater than the mass of the products. C) wood and oxygen is equal to the mass of the carbon dioxide and water vapor. D) wood decreases, while the mass of the products remains constant.
A) Water (H₂O) always contains hydrogen and oxygen in a 2:1 ratio by mass. B) The color of a compound can vary depending on its source. C) Carbon dioxide (CO₂) has a constant ratio of carbon to oxygen, regardless of its origin. D) All samples of table salt (NaCl) have the same ratio of sodium to chlorine.
A) 2:3 B) 1:3/2 C) 1:2 D) Cannot be determined without additional information.
A) 2 grams of hydrogen react with 1 gram of oxygen to produce water. B) Two molecules of hydrogen react with one molecule of oxygen to form two molecules of water. C) Water can decompose into hydrogen and oxygen under specific conditions. D) Hydrogen and oxygen react explosively to form water.
A) Cannot be determined without additional information. B) 5 moles C) 2.5 moles D) 10 moles |