Chem 103 Exam 1

Chem 103 Exam 1 Correct Answers Atoms are made up of protons, neutrons, and electrons. The charge on an electron is ____ - -1 Atoms are made up of protons, neutrons, and electrons. The charge on a neutron is ____ - 0 How many atoms are there in a single molecule of glucose (C6H12O6)? - 24 How many atoms are there in a single molecule of ethanol (C2H6O)? - 9 Hydrogen makes _____ bond(s) - 1 Oxygen makes _____ bond(s) - 2 Carbon makes _____ bond(s) - 4 How many protons are in phosphorus? - 15 How many protons are in zinc? - 30 How many protons plus neutrons are there in the most common isotopes of oxygen? - 16 The number of electrons in a neutral atom - is the same as the number of protons. The number of neutrons in an atom is always the same as the number of protons. - False Which of the following is a mixture? distilled water a sample of carbon dioxide sea water O2 - Sea water Which of the following is a element? ammonia water methane argon sulfuric acid - argon What energy source is the largest contributor to the US total? - Petroleum What energy source is the largest contributor to US electricity generation? - coal Is this a condensation reaction? The reaction of cellulose and water in the presence of cellulase to form glucose. - no The solubility concept like dissolves like is not involved in which one of the following - digestion of cellulose The geometry about carbon when it makes bonds to four other atoms is - tetrahedral The geometry about nitrogen when it makes bonds to three other atoms is - pyramidal What is geometry about oxygen in water? - bent