Which of the following statements is not an idea from Dalton\'s Atomic Theory? a

Question

Which of the following statements is not an idea from Dalton's Atomic Theory? a. An element is composed of extremely small indivisible particles called atoms b. All atoms of a given element have identical properties which differ from those of all other elements c. Atoms can be transformed into atoms of another element by nuclear reactions d. Compounds are formed when atoms of different elements combine with each other in small whole-number ratios, e. The relative numbers and kind of atoms are constant in a given compound. The molecular weight (in amu) of nitrobenzene, C_6 H_5 NO_2, is a) 107.11 amu b) 43.03 amu c) 109.10 amu d) 127.42 amu c) 123.11 amu Which of the following processes is an example of a chemical change? a. Condensation of moisture on a cold surface in a humid room b. Formation of a salt by evaporation of sea water. c. Separation of a solid from a liquid by filtration d. The burning of wood. e. Evaporating water at 100 degree C. Hydrogen peroxide, a common bleaching agent, decomposes as follows: H_2 O_2 (l) rightarrow H_2 O + 1/2 O_2 delta H = = - 98.2 kJ, the reaction is: a. Endothermic b. Exothermic c. Geothermal d. Illogical e. Endergonic The temperature of a patient was measured and found to equal 102 degree F. The temperature in degree C is a. 79 b. 29 c. 49 d. 39 e. 5 What is the resulting temperature when 35 g of water at 75 degree C is mixed with 15 g of water at 15 degree C? (Sp. Heat of water = 4.184 j/g degree C; Heat =mass x (- t_) x specific heat). a. 33 b. 48 c. 57 d. 120 e. 72 Which of the following is NOT a correct description of 17.0 g of ammonia, NH_3 a. The amount of ammonia that contains three moles of hydrogen b. One mole of ammonia c. The amount of ammonia that contains 14.0 g of nitrogen d. 170 times 6.022 times 10^23 molecules of ammonia e. Avogadro number of ammonia molecules Suppose we have 100 g of each of the following substances. Which sample contain the greatest number of moles (F W. = Formula Weight) a. HCl, F.W = 36.5 b. H_2O, F.W = 18.0 c. MgCO_3, F.W. = 84.3 d. AlCl_3, F.W = 133.3 c. NaCl, F.W. = 58.4 How many grams of hydrogen would combine with 6.0 g of carbon to form the compound ethylene C_2H_4? a. 1.0 g b. 2.0 g c. 4.0 g d. 8.0 g e. 10 g

Explanation / Answer

Ans 8 C. Atoms can be transformed into atoms of another elements by nuclear reactions.

Dalton atomic theory gave the characteristics of the elements and the atoms at the time when radioactivity was not yet discovered. So he did not give any postulate regarding the transformation of atoms of one element into atoms of another.

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