Module 1
What is the rule for adding and subtracting significant figures?
Round your answer to the LEAST amount of sig figs FOLLOWING THE DECIMAL PLACE
Name the 7 diatomic elements
H2
N2
F2
O2
I2
Cl2
Br2
What is the molecular weight of glucose (C6H12O6)
180.156 g/mol
What is the formula for percent yield?
Percent Yield =
(Actual amount produced / theoretical amount) x 100%
When is your exam?
Friday @ 12:30
What is the rule for multiplying and dividing significant figures?
Round your number to the LEAST AMOUNT OF SIG FIGS IN TOTAL
What is covalent bonding?
(bonding between a what and what AND what type of bond between electrons)
The bond between a nonmetal and nonmetal and is the equal sharing between electrons.
What is avogadro's number?
6.0221 x 10^23
Empirical formulas represent the simplest whole-number ratios of their respective types of atoms
Molecular formulas tell us how many atoms of each element are in a compound.
When is the review session and do I have to go?
Wednesday 4:30 - 6:30 PSCI 115
No... BUT I SHOULD AND WILL :D
D (g/mL) = Mass (g) / Volume (mL)
Name the following compounds:
Fe2O3
CO
CO-2
Iron (III) Oxide
Carbon Monoxide
Hypocarbonite
How many Hydrogen atoms are in 2 grams of H2O?
1.33 x 1023
How many grams of Calcium Fluoride can be produced from a reaction of 42.8 grams of fluorine and 36 grams of calcium? What is our limiting reagent?
70.10 grams CaF2
What is the formula for alkanes?
Give an example of an alkane
CnH(2n+2)
CH4
C2H6
ETC...
determine the number of moles of hydrogen atoms in 0.5 mL of water
ASSUME THE DENSITY OF WATER IS 1.00 g/mL
1 mole of H
Name the following compounds:
OH-
HCOOH
NH3
NH4+
Hydroxide ion
formic acid
ammonia
ammonium
Calculate the number of hydrogen atoms in 2.75 mg of lithium hydroxide.
6.91 x 1019 atoms of hydrogen
Balance the following reaction:
___C9H20+___O2 -> ___H2O + ___CO2
__1_C9H20+_14__O2 -> _10__H2O + _9__CO2
What is a combustion reaction?
Reaction between an alkane and oxygen gas that produces CO2 and H2O
Determine the density if a 22.8 g pebble is placed in a granulated cylinder filled with 7.5 mL of H2O with the final volume reading 12.3 mL?
4.75 g/mL
Name the following acids
HCL
HIO4
HCLO2
HBR
Hydrochloric acid
Periodic acid
Clorous acid
Hydrobromic acid
what are the steps of going from molecules/atoms back to grams?
divide by avogadro's number
multiply by the molar mass
If a scientist initially though that reacting Iron and Oxygen gas would produce 0.817 mole of Iron (III) oxide, but then realized the ACTUAL amount was 65.9 grams of Iron (III) oxide, what is the percent yield?
HINT: (Actual/theoretical) x 100%
50.5% Iron (III) Oxide
C10H12N2O?
C=68.15
H= 6.86
N=15.89
O=9.079