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