| A | B |
|---|
| A reaction that starts with two or more elements and produces one compound is a? | formation reaction |
| Counting the atoms and molecules in a substance is the first step to fully understanding the ____of the chemical reaction. | mathematics |
| The number that appears above the atomic symbol for an element on a period chart gives the atomic _____for that element. | number |
| According to the Law of _____ ______, the mass of the individual atoms before they are joined together to form a molecule should equal the masses of all the atoms summed after they are joined together. | Mass Conservation |
| _____ reactions are those chemical reactions which govern the process of burning. | Combustion |
| ______dioxide is not generally harmful to humans, but _____ monoxide is a poisonous gas. (Same word fills in both blanks) | carbon |
| Chemists use the ____concept to count the number of atoms or molecules in a given sample of matter. | mole |
| If two homonuclear diatomic hydrogen molecules are reacted with one homonuclear diatomic oxygen molecule, the result will be two _____ ______ molecules. | dihydrogen monoxide (water) |
| An atom's or a molecule's mass in amu tells one how many ____ it takes to have one mole of those atoms or molecules. | grams |
| A deomposition reaction changes a compound into its constituent _____ | elements |
| In chemical equations, the ____(which appear to the left of each substance) tell how many moles of that substance must be used in the chemical reaction. | coefficients |
| The masses listed on a Periodic chart are listed in ___ ____ ____, which are usually abbreviated "amu." | atomic mass units |
| The bigger the atomic mass, the ____ the atom is. | heavier |
| ____concentration determines wheter carbon dioxide, carbon monoxide, or just plain carbon soot will be produced during a combustion reaction. | Oxygen |
| The mass of an isopropyl alcohol (C3 H7 OH) molecule is ____amu. | 60.1 |
| Which one of the following is not one of the basic types of chemical reactions? a. decomposition b. reduction c. formation d. combustion | reduction |
| Which of the following represents the relationship between amu and grams? a. 1.00 grams - 1.66 x10-24 amu b. 1.00 amu=1.66 X 10 -24 g c. 1.00 amu = 1.00 g d. 1.00 amu = 1.66 X 10 24 g | 1.00 amu = 1.66 X 10 -24 g |
| Possible products from non-complete combustion reactions include which of the following? a. a metal oxide b. carbon soot c. carbon monoxide d. all the above | all the above |
| Which of the following reaction types contains a single compound as the product and multiple elements or compounds as reactants? a. decomposition b. oxidation c. formation d. combustion | formation |
| The numerical value for a mole is actually referred to as which of the following a. Aristotle's number b. Pasteur's number c. Darwin's number d. Avogadro's number | Avogadro's number |
| Which of the following is a decomposition reaction? a. 2N 2 H 8 Cr 2 O 7 --4Cr + 2N 2 + 8H 2 + 7O 2 b. Fe 2 O 3 + 3Mg -- 3MgO + 2Fe c. 2 Sb + 3 I 2-- 2 SbI 3 d. CH 4 + 2O 2 -- CO 2 + 2 H 2 O | A. 2N 2 H 8 Cr 2 O 7 -- 4Cr + 2N 2 + 8H 2 + 7O 2 |
| What is the mass of a Cs atom in kg? (1.00 amu = 1.66 X 10 - 24 g) a. 2.21 X 10 -25 kg b. 7.96 X 10 25 kg c. 7.96 X 10 22 kg d. 2.21 X 10 -22 kg e. None of the above | a. 2.21 X 10 - 25 kg |
| The best catalytic converter is only about how efficient? | 90% |
| Which sample has more atoms in it: 40.1 g Ca or 38.0 g F? | F |
| Which of the following is a combustion reaction? a. 2 N 2 H 8 Cr 2 O 7 -- 4Cr + @N 2 8H 2 + 7O 2 b. Fe 2 O 3 + 3 Mg -- 3 MgO + 2Fe c. 2 Sb + 3 I 2 -- 2 SbI 3 d. CH 4 + 2O 2 -- CO 2 + 2 H2O | CH 4 + 2O 2 -- CO 2 + 2 H 2 O |
| Write the chemical equation that describes the decomposition of isopropyl alcohol (C 3 H 7 OH) | Write the equation: C 3 H 8 O -- C + H 2 O 2 b. Balance the C's: C 3 H 8 O -- 3C + H 2 + O 2 c. Balance the H's: C 3 H 8 O -- 3C + 4 H 2 + O 2 d. Balance the O's: C 3 H 8 O -- 3C + 4H 2 + 1/2O 2e. Multiply by 2 to get rid of the 1/2: 2 C 3 H8O -- 2 (3C +4H 2 + 1/2 O 2 The chemical equation that describes the decomposition of isopropyl alcohol is 1C 3 H 7 OH --6C + 8H 2 + O 2 |
| Write the chemical equation that describes the complete combustion of isopropyl alcohol (C 3 H 7 OH) to carbon dioxide and water. | Show me your work. 2C 3 H 7 OH (g) +9O 2 (g) --6Co 2 (g) + 8 H2O (g). |
| Write a balanced equation for the formation of phosphoric acid (H 3 PO 4) | Show me your work: 2P + 3H 2 + 4O 2 --2H 3 PO 4 |
| What is the mass of an oxygen atom in grams? | Show me your work. 2.66 X 10 -23 g |
| A 1.1 X 10 3 gram liquid sample taken from a barrel in a warehouse is termed to be 57% benzldehyde (C 6 H 5 COH) by weigh. How many moles ob benzaldehyde are present in the sample? | Show me your work. 5.4 moles of benzldehyde present in the sample. |
