Project #4236 - Chemistry Quiz

Question 1 of 19 NaCl is dissolved in water, producing 1 gram of Na+ ions. What is the mass of Cl- ions produced? A) about 1 gram B) about 1.5 grams C) about 2.0 grams D) about 2.5 grams Question 2 of 19 Valence shells are: A) The lowest energy shell containing electrons B) The energy shell where n=1 C) The highest energy shell containing electrons D) The energy shell that binds strongest to the protons Question 3 of 19 Valence electrons are important to determine the following: A) The mass of the the atom B) Nuclear decay C) 1st ionization level D) The energy required to remove an electron from the lowest sub-shell Question 4 of 19 How many oxygen atoms are in the chemical formulaCa(HCO3)2 A) 3 B) 2 C) 5 D) 6 E) 7 Question 5 of 19 What is the molecular mass for Sr(NO3)2 A) 212 g/mol B) 164 g/mol C) 118 g/mol D) 500 g/mol Question 6 of 19 95. A compound contains only carbon and hydrogen and has a formula mass of 28 amu. What is the formula of the compound? A) C2H4 B) C2H6 C) C3H4 D) C2H6 Question 7 of 19 In 7 mol of nickel, how many atoms are there? A) 6E+23 B) 8E+23 C) 2E+24 D) 4E+24 Question 8 of 19 How many moles of zinc atoms are in a pure zinc cup with a mass of 98 g? A) 0.5 moles B) 1 moles C) 1.5 moles D) 2 moles Question 9 of 19 How many grams of Cl are in 41 g of CFCl3 (chlorofluorocarbon)? A) 25 grams Cl B) 27 grams Cl C) 30 grams Cl D) 32 grams Cl Question 10 of 19 Calculate the mass percent composition of hydrogen in C3H6. A) 6% B) 14% C) 18% D) 20% E) 24%   Question 11 of 19 Which of the following compounds is not soluble? A) LiOH B) KOH C) NaCl D) PbI2 E) KNO3 Question 12 of 19 A spectator ion is an ion that: A) Is present on both sides of a balanced chemical reaction B) Is neither an acid or base in a reaction C) Reacts with water in a chemcical reaction D) Watches the chemical reaction occur E) Is used up by the end of the chemical reaction Question 13 of 19 For the reaction:2 Na(s) + Cl2 (g) -> 2 NaCl(s)If 61 g of Na react with 71g of Cl2, what is the limiting reactant? A) Na(s) B) Cl2(g) C) NaCl(s) D) NaCl(g) Question 14 of 19 For the reaction:2 Na(s) + Cl2 (g) -> 2 NaCl(s)If 61g of Na react with 71g of Cl2, what is the theoretical yield of NaCl in grams? A) 56 B) 61 C) 71 D) 117 E) 169 Question 15 of 19 What is true for the following reaction:CH4(g) + 2 O2(g) -> CO2(g) + 2 H2O(g) delta Hrxn = - 802.3 kJ A) This is an exothermic reaction B) This is an endothermic reaction C) This reaction pulls heat from the surroundings D) This reaction feels cold Question 16 of 19 Which one of these types of electromagnetic radiationhas the shortest wavelength? A) radio waves B) microwaves C) infrared D) ultraviolet Question 17 of 19 In the Bohr model, what happens when an electron drops from an excited state? A) The electron gives off a photon B) A chemical reaction occurs C) The nucleus decays into an alpha particle D) The electron absorbs energy Question 18 of 19 Arrange the following elements in order of increasing ionization energy: A) Ca < Mg < Na < S < F B) Ca < Na < Mg < F < S C) Ca < Na < Mg < S < F D) Mg < Ca < Na < S < F Question 19 of 19 Pick the correct arrangement of atoms in order of increasing atomic size: A) Kr < Ar < Si < N < F B) N < F < Si < Ar < Kr C) F < N < Si < Ar < Kr D) N < F < Si < Kr < Ar E) F < N < Ar < Si < Kr

Subject Science
Due By (Pacific Time) 04/15/2013
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