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BJU Chem exam 1-9A
review
| Question | Answer |
|---|---|
| Name the compound P2O5 in written form. | diphosphorus pentoxide |
| A reversible reaction has what symbol? | --------> <------- where one arrow points left and the other is right and they are stacked onto each other |
| The notation used indicates the substance is dissolved in water? | (aq) |
| The first element listed in the formula of a binary acid is always? | hydrogen |
| Hydrogen , oxygen and another nonmetal for this acid. | ternary |
| Which halogen always has an oxidation number of -1 due to its high electronegativity? | flourine |
| Standrdized set of rules for naming something | nomenclature |
| If solid falls out of solution during a reaction it is called | a precipitate |
| Formula for tin (II) oxide | SnO |
| formula for tin(IV) oxide | SnO2 |
| Sum of oxidation numbers in a compound should equal | 0 (zero) |
| Geometric shape of ozone | bent |
| Which two molecular shapes must always be polar? | bent and pyramidal |
| electrons shared in a covalent bond are called what? | bonding pair |
| Only metal that is a liquid at room temperature? | mercury (Hg) |
| Element symbol for copper | Cu |
| yield symbol for chemical equations? | ---------> |
| oxidation number for Cu in CuSO4? | +2 |
| A hydrate compound contains water molecules with this type of structure? | crystalline |
| Penta in the Greek prefix means? | 5 |
| The Stock system used to name ionic compounds containing metal with multiple oxidation states uses? | Roman numerals |
| Oxyanion is? | oxygen and one other element |
| Molecule not linear in shape , an example? | GeF2 |
| VSEPR theory says a three-atom molecule are sometimes what? | linear |
| Two=atom molecules according to VSEPR are always what? | linear |
| What shape is HCN? | linear |
| Polar compound example | NH3 |
| Most metals have low electron affinities so they are most likely to do what? | share electrons freely when bonding to each other |
| Examples of a covalent molecule include: | F2, CO, and NH3 |
| When oxygen and sodium bond, what type of bond would you expect? | ionic bond |
| Copper, nickel, zinc and potassium are examples of what? | metals |
| The chemist who devised the electrongativity scale? | Pauling |
| Z is equal to what in an atom? | protons |
| Sublevel d holds how many electrons? | 10 |
| Biochemistry is the study of chemical processes in what type of organisms? | living things |
| Workability is the goal of what? | science |
| Organic chemistry is the branch that studies primarily compounds containing this______. | carbon |
| what is orbital notation for Bromine using the diagnal rule? | Br: [Ar] 01 01 01 01 01 (3d) shell 01 (4s) shell 01 01 0 (4p) shell |
| VSEPR stands for what? | valence shell electron pair repulsion theory |
| Lewis structure for CH4 and its shape is? | C in middle with 4 H around, shape tetrahedral |
| convert 450 cm to mm | 4.5x10 3rd |
| How many protons, electrons and neutrons are in 59/27 Co with a 2+ oxidation number? | 52 protons, 32 neutrons and 25 electrons |
| How many significant digits in 0.037010? | 5 |
| Hydrogen has an electron configuration of? | 1S |
| Partial charge has symbols which look like what? | o with a negative sign about them and indicated - or + sign for the charge |
| Which element is the most reactive? | Flourine |
| In the Periodic table, what are these: F, Cl, Br, I, and At called? | Halogens |
| How many valence electrons does Neon have? | 8 |
| How many valence electrons does Li have? | 1 |
| On the periodic table, the small number listed under an element is called what? | atomic mass |
| What symbol indicates that heat must be supplied for a reaction will occur? | small triangle |
| MgSO4 is called? | Magnesium sulfate |
| Mg3CO3 x 5H2O is called? | Magnesium carbonate pentahydrate |
| CuCl2 is called? | cupric chloride |
| CuSO4 is called? | copper (II) sulfate |
| HClO2 is what type of compound? | ternary acid |
| HCl is what type of compound? | binary acid |
| CO is what type of compound? | binary covalent compound |
| N2S5 x 3 H2O is called what type of compound? | hydrate |
| Na2O4 is called what type of compound? | polyatomic ionic compound |
| When writing a binary ionic compound, what ending is used in the second name? | -ide |
| The oxidation number of oxygen is? | 2+ |
| The criss cross method is good for what? | Setting up formulas for binary compounds |
| NO2 is NOT electrically what? | a neutral ion |
| The Greek system of prefixes is used to do what? | indicate how many atoms of each element are in a binary covalent compound |
| Who was the German chemist who found the system of naming compounds? | Stock |
| Name this: HCl (aq) | hydrochloric acid |
| Name this: N2 O3 | dinitrogen trioxide |
| Name this: H3 PO4 | phosphoric acid |
| Name this: HClO4 | perchloric acid |
| Name this: HBrO | hypobromous acid |
| What is the chemical formula for ammonium fluoride? | NH4F |
| What is the chemical formula for sodium phosphate? | Na3PO4 |
| What is the chemical formula for carbon disulfide? | CS2 |
| What is the name of the chemical KClO3? | potassium chlorate |
| What is the name of the chemical CaCl2? | calcium chloride |
| What is Avogadro's number? | 6.022 x 10 the 23rd |
| What is a mole? | 6.022 x 10 the 23rd of anything (atoms and molecules) |
| What is Avogadro's number equal to? | 12g of Carbon 12 |
| Molar mass is calculated how? | by adding the mass of each element together |
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