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