Chapter 2 _ ans _ Tro

# Chapter 2 _ ans _ Tro - Chapter 2(Tro 1st Ed 32 Given 21 kg...

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Chapter 2 (Tro 1 st Ed) 32. Given: 21 kg gasoline; 84 kg oxygen Find: mass of carbon dioxide and water Conceptual Plan: total mass reactants = total mass products Solution: Mass of reactants = 21 kg gasoline + 84 kg oxygen = 105 kg mass Mass of products = mass of reactants = 105 kg of mass of carbon dioxide and water. ( According to the Law of Conservation of Mass, matter is not created or destroyed in a chemical reaction, so, since carbon dioxide and water are the only products the masses of gasoline and oxygen must combine to form the mass of carbon dioxide and water.) 34. Given: sample 1: 6.98 grams sodium, 10.7 grams chlorine; sample 2: 11.2 g sodium, 17.3 grams chlorine Conceptual Plan: determine mass ratio of sample 1 and 2 and compare. Cl Na mass mass 10.7 1; 1.53 6.98 17.3 2; 1.54 11.2 Cl Na Cl Na mass g Sample mass g mass g Sample mass g == Results are consistent with the law of definite proportions. ( According to the Law of Definite Proportions, the mass ratio of one element to another is the same for all samples of the compound.) 44. a) Since electrons are smaller than protons, and since a hydrogen atom contains only one proton and one electron, it must follow that the volume of a hydrogen atom is mostly due to the proton. INCONSISTENT with Rutherford's nuclear theory because most of the volume of the atom is empty space, throughout which tiny, negatively charged e l ectrons are dispersed. b) A nitrogen atom has seven protons in its nucleus and seven electrons outside of its nucleus. CONSISTENT with Rutherford's nuclear theory because there are as many negatively charged particles outside the nucleus as there are positively charged particles within the nucleus.

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Chapter 2 _ ans _ Tro - Chapter 2(Tro 1st Ed 32 Given 21 kg...

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