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Binary Molecular Compounds
Ionic Compounds
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100
Name these compounds P4H9, B2H4, NH3
Tetraphosphorus nanoxide diboron tetrahydride nitrogen trioxide (aka ammonia)
100
Name these compounds: MgF2, KBr, NaCl
Magnesium Fluoride, Potassium Bromide, Sodium Chloride
100
What type of compound is S03, KF, P4O9 and what each composed of?
S03 = molecular (nonmetals) KF = Ionic (nonmetal + metal) P4O9 = molecular (nonmetals)
100
Whats the formula for density?
Mass/Volume
100
How many significant figures are in the number .00999010?
6
200
Write the formula for the following: dinitrogen trioxide, phosphorus trifluoride, aluminum hydroxide, silicon tetrafluoride. Which one is not a molecular compound?
N2O3, PF3, Al(OH)3, SiF4
200
Name these compounds: CaI2, FeCl2, CoBr3
Calcium Iodide, Iron (II) Chloride, Cobalt (III) Bromide
200
Name these: HCl (aq), HI(g), HBr(aq), HF(g)
Hydrochloric acid, Hydrogen Iodide, Hydrobromic acid, Hydrogen Fluoride
200
Draw on the board: the difference between precision and accuracy.
Drawn...
200
Complete the following calculation using the proper number of significant figures: 2.34 - 1.293
1.05
300
Why are prefixes used when naming binary molecular compounds?
We use Greek prefixes to explicitly indicate how many of each element are present
300
When and would we use prefixes when writing ionic compounds names.
Trick Question: We don't. We only use prefixes when naming molecular compounds.
300
What type of bonds hold together polyatomic ions?
Covalent bonds
300
On the board, correctly write the symbol of an element with the mass and atomic numbers shown: Carbon 14
Drawn
300
A bar is 400cm long. How many meters is it?
4 meters
400
Name or write the formula for these: CH3, NO2, Carbon monoxide, PCl5, disulfur decafluoride, dinitrogen tetrahydride
Carbon trihydride, nitrogen dioxide, CO, phosphorous pentachloride, S2F10, N2H4
400
Name or write the formula for these: NIO, Copper (II) Chloride, CrCl3, Copper (I) Oxide, aluminum carbonate
Nickel Oxide, CuCl2, Cromium (III) Chloride, Cu2O, Al2(CO3)3
400
Name these or write the formula: Cr(ClO4)3, ammonium nitrate, ClO-, HClO4-
Chromium perchlorate, NH4NO3, hypochlorite, perchloric acid
400
How many inches are in 1.00 km?
39,400in
400
Explain the differences between the scientists Thomson, Millikan, Rutherford, and Chadwick. What were their experiments and what are they known for discovering.
-Thomson: Cathode ray tube experiment Discovered the electron (negatively charged) Determined the mass/charge ratio of an electron -Millikan: oil drop experiment Determined the charge on an electron Determined the mass of an electron -Rutherford: Gold foil experiment Used radioactivity (alpha particles, these are protons) Determined the positive charged particles were clustered together, called this the nucleus -Chadwick: Used alpha particles and identified neutrons, also located in the nucleus
500
Name or write the formula for these: IF3, Octanitrogen tetroxide, Cl2O7, N3H4, Tribromine nonoxide
Iodine trifluoride, N8O4, Dichloride septa oxide, trinitrogen tetrahydride, B3O9
500
Name or write the formula for these: silver phosphate, V2O5, lithium acetate
Ag3PO4, vanadium (V) oxide, LiC2H3O2
500
Name these: potassium dihydrogen phosphate, CdI2, HBr
KH2PO4, cadmium (II) Iodide, hydrobromic acid or hydrogen bromide depending on state
500
The density of a penny minted after 1983 is 7.18 g/cm3. What is the average volume of a penny if the mass of 1 x 105 pennies is 5.51 x 102 lb?
0.348 cm3/penny
500
Explain the difference between a molecular and an empirical formula. Can the molecular and empirical formula ever be the same.
Molecular formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. They can be the same at times.