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Chemistry Midterm
| Question | Answer |
|---|---|
| What is the function of a Buret? | Used in titrations |
| What is the function of a condenser? | Used in distillation |
| What is a precipitation? | Solid |
| What is the basic unit of mass in the SI system? | Kilogram |
| What is the correct symbol for a kilometer in length? | km |
| What is the common name assigned to a volume equal to a cubic centimeter? | milliliter |
| What is the mass of one cubic centimeter of water at 4 degrees celsius? | 1 gram |
| A mixture that is uniform is a(n)? | homogenous solution |
| The law of conservation was applied to which lab? | Distillation Lab |
| What is an extensive property? | Do not measure |
| What is the physical property that describes the ration of the mass of an object to its volume? | Density (mass/volume) |
| What is a substance that contains two elements in a chemical combination called? | Compound |
| What type of property would the color of a substance be? | Extensive |
| Endothermic reactions are defined as those reactions that... | Absorb Energy |
| What is a variety of matter that is not uniform? | Heterogenous |
| What is energy of motion called? | Kinetic Energy |
| What form of energy is chemical energy? | Potential Energy |
| What is the lowest theoretical temperature that serves as the zero point for the temperature scale called? | Kelvin |
| What is a measurement of a unit of energy called in the SI system called? | Calorie |
| In what type of reaction do the products of the reaction always contain more potential energy than the reactants? | Endothermic |
| The energy (endo.) at which a substance in the liquid state freezes is the same as the energy (exo.) at which the same substance... | Melts |
| What is the name of the value that is equal to 1 cal/gram Celsius for water ONLY? | Specific Heat |
| What type of reaction is the following? Nickel + Hydrochloric Acid _______ | Replacement |
| What type of reaction is the following? Sodium Hydroxide + Sulfuric Acid ________ | Ionic |
| What type of reaction is the following? Hydrogen + Oxygen _______ | Composition |
| Silver nitrate and copper produce copper nitrate and what other element? | Silver |
| How much volume does one mole of any gas occupy? | 22.4L |
| What do Calcium and Nitric Acid produce? | Calcium Nitrate and Hydrogen |
| What is the gram formula weight of any element equal to? (Volume) | 22.4L |
| From which of these Elements (carbon, nitrogen, oxygen, fluorine,) do the electrons entering the p orbital first pair up? | Carbon |
| How many orbitals are in the second shell? | 2 |
| How many valance electrons are in the outer shell of the Noble Gasses, accounting for their stability? | 8 |
| If an element has 16 electrons, how many would fit in the second shell? | 8 |
| What is a major factor responsible for the chemical properties of an element? | Isotopic Number |
| Which shell can fit no more than two electrons? | First |
| What are electrons in the outer shell called? | Valence Electrons |
| How many valence electrons are do the elements in the 7th column to the left of the Noble Gasses have? | 2 |
| What substance has the highest level of potential energy? | Activated Complex |
| What kind of reaction has the highest energy of products? | Endothermic |
| What is the shape of an S orbital? | Sphere |
| What is the closest shape of a P orbital? | Dumbbell (peanut) |
| What determines the number of electrons? | Atomic Number |
| In which lab did we find the amount of energy needed to melt ice? | Calorimetry |
| What is the process of producing soap called? | Saponification |
| What is the process of producing light called? | Chemiluminescence |
| What was the lab called in which the unknown were identified by color, precipitations, and gases? | Qualitative Analysis |
| What do the total positive and negative charges in a formula add up to? | Zero |
| In the following equation, what is/are the reactant(s)? 2 H2 +O2 __________ 2 H2O | Hydrogen and Oxygen |
| The balancing of a chemical equation is accomplished by.... | Changing the coefficients next to the formulas |
| How would the following equation be described? H2 + Cl2 ------ 2 HCl + enegy | Exothermic |
| How would the following reaction be classified? Ca + MgSO4 ---- CaSo4 + Mg | Replacement |
| How would the following reaction be classified? CaO + H2O ------ Ca(OH)2 | Ionic |
| What is the gram-formula weight of an element equal to? (Mass) | the atomic mass of an element, and one mole of the element |
| The mass of one mole of any substance is... | Equal to 6 X 10^23 molecules |
| If HCl is hydrochloric acid, what is the name given to HF? | Hydrofluoric acid |
| What change is represented by the following equation? H2O(s) ------ H2O(l) | The melting of ice (solid --> liquid) |
| Chemical formulas indicate the elements present in the compound and... | Relative number of atoms of each element in the compound |
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