AMALEAKS.BLOGSPOT.COM CHEM-112 WEEK 1-10 Basic component that makes up any kind of material. A: atom This basically makes up any kind of material A: atom Anything that occupies space and has mass A: matter What is the general term for any body that has mass and occupies space? A: matter General term referring to anything that occupies space and has mass A: matter Study of materials and its components A: Chemistry General term for anything with mass and has volume A: matter Quantities standardized for scientific use A: SI Smallest building block of any material A: atom Branch of chemistry that deals with compounds containing carbon A: organic Path of electron around the nucleus of an atom A: orbit Most basic building block of any substance A: atom Quantity with square unit A: SI What kind of base forms hydroxide ions when mixed with water? A: weak Path followed by an electron around the nucleus of an atom A: orbit What do you call the path of an electron around the nucleus of an atom? A: orbit Science that deals with the chemical composition of chemical processes associated with the Earth and other planets. A: geochemistry Reaction involved when a complex reactant is broken down into a simpler product. A: decomposition What kind of reaction is involved when a complex reactant is simplified? A: decomposition Science dealing with the composition of processes involving the Earth and other planets A: geochemistry Quantity that refers to the space occupied by a body A: volume Quantity referring to the space occupied by a body A: volume Gas law involving constant pressure. A: charle’s law Product of the combination of atoms during chemical reactions A: molecule Results from the combination of atoms during chemical reactions A: molecule What substance results from the combination of atoms during chemical reactions? A: molecule Term used to refer to a charged atom A: ion In one molecule of water, how many percent is hydrogen? A: 11.19 Consider one molecule of water. How many percent of this molecule is hydrogen? A: 11.19 In the oxidation of methane alcohol in air, if 209 grams of this substance are used up, how many grams of water are produced? A: 235 How heavy (in grams) is one molecule of ethanol A: 46.07 Consider the burning of methanol in air. If 209 grams of methanol are used up in the combustion, how much water (in grams) is produced? A: 235 What is the chemical reaction characterized by the union of reactants A: synthesis What is the chemical reaction characterized by the union of reactants? A: synthesis How heavy is a molecule of sodium hypochlorite? Express your answer in grams. A: 74.44 How heavy (in grams) is one molecule of sodium hypochlorite? A: 74.44 When burning 1200 grams of carbon, how much carbon monoxide (in grams) will be produced? A: 2800 In the burning of 1200 grams of carbon, how many grams of carbon monoxide will be produced? A: 2800 When 124 grams of aluminum reacts with 601 grams of Fe2O3, determine how many grams of Al2O3 are formed. A: 234 How many molecules are in 3 moles of calcium tetrachloride? A: 1.8066 x 10^24 In a molecule of ammonia, how many percent is nitrogen? A: 82.24 Consider a molecule of ammonia. How many percent of this molecule is nitrogen? A: 82.24 How heavy (in grams) is one molecule of ethanol? A: 46.07 Consider a molecule of ethane. How many percent of ethane is carbon? A: 79.89 In one molecule of ethane, how many percent of this molecule is carbon? A: 79.89 In a molecule of potassium hydroxide, how many percent of this molecule is oxygen? A: 28.52 The molecular mass of hydrochloric acid is how many grams? A: 36.46 The mass of hydrochloric acid is how many grams? A: 36.46 How many grams is a molecule of hydrochloric acid? A: 36.46 How heavy is a molecule of sodium hypochlorite? Express your answer in grams A: 74.44 How many molecules are there in 8 moles of benzoic acid? A: 4.8176 x 10^24 Consider the reaction of 124 grams of Al with 601 grams of Fe2O3. Compute for the mass (in grams) of Al2O3 formed. A: 234 Consider one molecule of sodium sulfate. Determine the percentage of sulfur in it. A: 22.57 In a molecule of sodium sulfate, determine the percentage of sulfur in it. A: 22.57 In one molecule of sodium sulfate, how many percent of it is sulfur? A: 22.57 How many molecules are there in 0.75 mole of sodium chloride? A: 4.5165 x 10^23 A 0.75 mole of sodium chloride has ___ x 1023 atoms. Note: The answer must be in 4 decimal places. A: 4.5165 Find the molecular mass of hydrogen peroxide in grams? A: 34.01 What is the molecular mass (in grams) of hydrogen peroxide? A: 34.01 Determine the molecular mass (in grams) of dinitrogen trioxide? A: 76.01 How heavy (in grams) is one molecule of ethanol? A: 46.07 How many grams is one molecule of ethanol? A: 46.07 Suppose you want to burn 1200 grams of graphite. How much oxygen (in grams) would you need? A: 1600 If you want to burn 1200 grams of carbon, how many grams of oxygen would you need? A: 1600 How many grams is one molecule of calcium oxide? A: 56.08 How heavy (in grams) is calcium oxide? A: 56.08 How heavy (in grams) is one molecule of sulfuric acid? A: 98.07 How many grams is a molecule of sulfuric acid? A: 98.07 What is the mass (in grams) of sulfuric acid? A: 98.07 Determine how many atoms of carbon dioxide does 0.55 mole of this molecule has? ____ x 1021 A: 7.53 A 0.55 mole of carbon dioxide has ___ x 1021 atoms. A: 7.53 How many molecules does 0.55 mole of carbon monoxide has? A: 7.53 x 10^21 What do you call the particle with more positive charges than negative charges? A: cation What is the molecular mass (in grams) of calcium carbonate? A: 162.11 What do you call the agent in a redox reaction from which electrons are released? A: reducing Agent in a redox reaction from which electrons are removed. A: reducing The twelve-gauge copper wire is roughly cylindrical and has a diameter of approximately 0.1040 in. The density of copper is 8.92 g/cm3 and copper atoms have an approximate atomic radius of 135 pm. What is the mass (in grams) of a 100-ft piece of copper wire? A: 1491 Quantity used to measure distance between two points. A: length Quantity that measures the distance between two bodies A: length Made up of proton/s, neutron/s, and electron/s. A: atom Composed of proton/s, neutron/s, and electron/s A: atom This body is composed of proton/s, neutron/s, and electron/s. A: atom Which of the following is the lightest particle? A: electron Term used to refer to a charged atom. A: ion Which is the lightest: proton, neutron, or electron? A: electron Particle that contains more positive charges than negative charges. A: cation Particle with more positive charges than negative charges A: cation Science that deals with the composition of materials. A: chemistry Study dealing with the composition of materials A: chemistry What kind of acid completely dissociates when mixed with water? A: strong Composed of a nucleus and electron/s. A: atom Always has a nucleus and electron/s A: atom Science that deals with energy and its interactions with matter. A: physics Science of energy and its interactions with different materials A: physics Particle with more negative charges than positive ones. A: anion Particle having more negative charges than positive ones A: anion Type of bond between a cation and an anion. A: ionic Form of atom that is positively charged with respect to its neutral state. A: cation What type of bond exists between a cation and an anion? A: ionic Atom with a positive charge with respect to its neutral state A: cation Chemistry that deals with compounds with carbon A: organic What quantity is constant in Charles's law? A: pressure Formed when atoms combine through bonds. A: molecule How many grams is one molecule of sodium bicarbonate? A: 84.01 What is the mass (in grams) of sodium bicarbonate? A: 84.01 Amount of material contained by a body. A: mass Measurement of the amount of material in a body A: mass This refers to the amount of material in any given body. A: mass An atom that is negatively charged. A: anion Negatively-charged atom A: anion Chemistry of materials related to living tissues. A: biochemistry Chemistry living tissues. A: biochemistry This branch of chemistry is related to living tissues. A: biochemistry Method of comparing an unknown quantity with a known quantity A: measurement Process of comparing an unknown quantity with a known quantity. A: measurement Bond formed by the sharing of electrons between atoms. A: covalent Bond formed through the sharing of electrons between atoms A: covalent What kind of bond is formed by the sharing of electrons between atoms? A: covalent Comparison of something unknown with a standard. A: measurement Quantity used to express the amount of a substance. A: mole What is the percentage of hydrogen in propanoic acid? A: 8.16 How many percent of propanoic acid is hydrogen? A: 8.16 Quantity expressed with cubic unit. A: volume Three moles of methane has ____ x 1024 molecules. A: 1.8066 Eight moles of benzene has ____ x 1024 molecules. Note: The answer must be in 4 decimal places. A: 4.8176 Reaction wherein the anions and cations of two compounds switch places to form two entirely different compounds. A: double replacement This reaction involves the anions and cations of two compounds switching places to form two entirely different compounds. A: double replacement Uses Avogadro’s number to have a numerical value. A: mole Reaction that involves the transfer of protons from an acid to a base. A: acid-base Reaction characterized by production of a complex product from simple reactants. A: synthesis It is the phase in which the sister chromatid separate. A: anaphase What type of reaction is characterized by the production of a complex product from simple reactants? A: synthesis How many percent of one molecule of potassium hydroxide is oxygen? A: 28.52 How much (in percent) of one molecule of potassium hydroxide is oxygen? A: 28.52 This particle has more negative charges than positive ones. A: anion Reaction involved when a complex reactant is broken down into a simpler product. A: (synthesis) Reaction generally described as: AB + C AC + B A: single replacement This type of reaction is generally described as: AB + C -> AC + B A: single replacement What is the process of comparing an unknown quantity with a known quantity? A: measurement Chemical reaction characterized by the combination of reactants. A: synthesis How much volume (in L) will 0.20 mol hydrogen iodide at 300 K and 100.0 kPa occupy? Use R = 8.314 kPa*L/(K*mol) = 0.08205 atm*L/(mol*K). A: 5 How many molecules are present in 3 moles of methanal? A: 1.8066 x 10^24 Type of bond between an anion and a cation A: ionic In a titration experiment, 500 mL of gaseous hydrochloric acid at 300 K and 100 kPa dissolved in pure water is needed to neutralize 12.5 mL of sodium hydroxide. What is the concentration of the basic solution (in mol/L)? A: 1.60 Substance formed when atoms bond with each other A: molecule Identify which quantity is constant in Boyle's law. A: temperature What is the resulting concentration (in mol/L) of aqueous hydrochloric acid if 500 mL of its gaseous form at 300 K and 100 kPa will be dissolved in 100 mL pure water? Use 8.314 kPa*L/(K*mol). A: 0.200 Consider the reaction of 3.66 g of a sample containing zinc (atomic weight = 65.4) and magnesium (atomic weight = 24.3) with a dilute acid to yield 2.470 L of hydrogen gas at 101.0 kPa and 300 K. What is the percentage of zinc in the sample? A: 30 (2 points) Suppose 4 moles of nitrogen gas are confined to a 6.0 L container at 1770C and 12.0 atm. If the container will be allowed to isothermally expand to 36.0 L, determine the final pressure experienced by the gas. (Express the answer in atm) A: 2 Gas law involving constant pressure and temperature. A: avogadro’s law Quantities specifically used in scientific measurements A: SI (2 points) A 60.0 liter tank of gaseous chlorine at 270C and 125 atm suddenly had a leak. When this leak was discovered, the pressure was found to have reduced to 50 atm. Determine how many moles of chlorine escaped from the tank. A: 187.5 Consider 6.2 liters of an ideal gas compressed at 3.0 atm and maintained at 37 degrees Celsius. Determine how many moles of this gas are contained. A: 0.75 One liter of an air sample at 250 degrees Celsius and 1 atm is compressed to 3 mL at a pressure of 1000 atm. Determine the temperature of the air sample in kelvins. A: 983 Gas law involving constant temperature. A: Boyle's Law Treating 50.0 mL of silver nitrate solution with excess hydrogen iodide gas produces 2.35 grams of silver iodide. Compute for the concentration (in M) of the silver nitrate solution. A: 0.2 (3 points) Suppose methanol will be burned in air. If 209 grams of this substance are used up in the reaction, how many grams of water are produced? A: 235 (2 points) Consider a 0.316 mole sample of nitrogen gas. If this is placed in a 4-L container at 315 K, what is the pressure (in torr) of the gas? A: 1550
