Question

15) 15) The chemical equation below is not balanced. Balance the ce which statement concerning the balanced equation is TROR ced. Balance the equation, then determine KCIO3(s) - KCI() + O2(g) A) The balanced equation will have three atoms of oxygen on each B) The balanced equation will have an equal number of moles of reactants and products. The balanced equation will contain a substance whose coefficient is 1. D) The balanced equation will have one atom of potassium on each side. E) The balanced equation will have two atoms of chlorine on each side. are 16) - 16) Consider the chemical equation shown below. How many moles of oxygen gas are needed to react with hydrogen to form one mole of water? 2H2(g) + O2(g) → 2H2017 A) 1 mol B) 0.5 mol C) 3 mol D) 4 mol E) 5 mol 17) 17) Hydrogen fluoride will react with glass (silicon dioxide, SiO2) according to the equation below. What mass of HF is required to react completely with 16.0 g of glass? Molar masses: Si, 28.09 g/mol; F. 19.00 g/mol; H, 1.01 g/mol; O, 16.00 g/mol] 4HF(g) + SiO2(5) → SiF4(g) + 2H2O(g) A) 5.33 g B) 80.0 g C) 64.0 g D) 21.3 g E) 320 g 18) 18) Glucose (C6H1206) is an important energy-rich compound, produced by photosynthesis according to the equation below. What mass of glucose can be produced from 2.61 mol of CO2 and the necessary water? [Molar masses: C, 12.01 g/mol; H, 1.01 g/mol; 0, 16.00 g/mol] C6H1206/ +602(g) 6CO2(g) + 6H2007 A) 78.4 g B) 0.0869 g C) 69.0 g D) 0.0128 g E) 414 g 19) 19) Upon mixing a clear colorless BaCl2 solution with a clear, colorless Na2SO4 solution according to the reaction below, a student observes a white cloudiness form. What is responsible for the cloudiness that is observed? BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq) A) NaCl B) BaSO4 C) Na2SO4 D) BaCl2 E) It is impossible to tell without doing the reaction oneself.

Answer 1

:57 2KC103 (8) 2 Keils) + 30(3 two alors of - Ans. Ô the balanced equation will have Chlorine on each side. R Chorine on ear 247 249(0) + 0269) — 2+206) >> ?!(9) + 1969 — thoſe) so, to priduce I mole Hooles , or more 02 (4) - has to react with Hig) Ame. B) 0.5 mol 4HF (8) + Sidz 6) ► sig (9) e 24h06) log sig = cool and = 0.267 mot 17/ react with i 4 mots tif(a) 4XA267 is so, - sus I mole siz 0.261 a a 1.068 mole. HF reguront = 1.069 mol = 1.068 moix 2o.orgottet - 21.3719 Am @21:3g |

(18) Sock You Back Colligo (2) 60265 X stolos boll) 660269 + 676061) - CH1206 + 602 (9) from 6 mite coz I mere gluose produced su i 2-61 a coz, 261 = 0.435 41 x 180, 18 gmott = 414.2g a 4149 Am. E) 414 g y = 0,435 igy. Ballz (09 + Na, 504 (aq) -> Bally (s) + 2 Naci cand (ind insoluble in Dakes and give prepnitate) . B) Bas