According to the kinetic-molecular theory of matter, particles in a gas? a. are

Question

According to the kinetic-molecular theory of matter, particles in a gas? a. are packed closely together in a regular array. b. are packed closely together like solids, but they are not confined to specific positions. c. expand to fill their container. d. vibrate back and forth about an average position. e. move slower as the temperature increases. 2. 1. Predict which ionic compound has the highest melting point. a. NaBr, b. MgBr2 c. RbI, d. AlN e. KCl - 3. 19. Antimony has 2 stable isotopes 121-Sb mass 120.9038 and 123-Sb mass 122.9042 amu. Calculate the percent abundances of these isotopes. Hint: Use amu from periodic table and assign x value as decimal abundance for one isotope and 1-x value for other to solve. a. 50% and 50% b. 40% and 60% c. 57% and 43%. d. 80 % and 20%

Explanation / Answer

C- expand to fill container, d-AlN, Sb- mass= 121.76 = (120.9038 x m) +(122.9042 x(1-m)), m = 0.57, 1-m = 0.43 , hence answer is c 57% and 43 %

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