Redox
Equations
Moles and Stoichimetry
Measurement
Organic Compounds
100
What is oxidation?
loss of electrons
100
balance this equation: HI + O2------> I2 + H2O
4 HI + O2------>2 I 2(subscript) +2 H2O
100
How many moles in 116 g of NaCl?
2 moles
100
What is an uncertain digit?
The last significant figure is a 5 because we can't be certain due to human error and instruments what the number actually is.
100
What is an organic compound?
A compound that contains carbon.
200
What is reduction?
Gain of electrons
200
Balance this equation: Mg + N2 -----> Mg3N2
3 Mg + N2 -----> Mg3N2
200
How many moles in 72 g of H2O?
4 moles
200
How many significant figures in this number? .00050874
5
200
What is the formula for an alkane?
CnH2n+2
300
In 2Mg + O2---> 2MgO, which element is oxidized?
Magnesium
300
Balance this equation: BO3 + Mg ------> MgO + B
BO3 +3 Mg ------> MgO + B
300
How many grams are in 3 moles of CO2?
132 g
300
Change this number into scientific notation. 778,500
7.78500 x 10 (5th power)
300
What is the formula for an alkene?
CnH2n
400
In 2Mg + O2---> 2MgO, which element is reduced?
O2
400
Balance this equation: HF + O2 ---->F2 + H2O
4HF + O2 -------> 2 F2 +2 H2O
400
How many grams are in 5 moles of N2?
140 grams
400
Change this number into scientific notation. .0010025678
1.0025678 x 10 (negative 3 power)
400
What is the formula for an alkyne?
CnH2n-2
500
Why is redox ( oxidation and reduction reactions) important?
Common in metabolism and used in industry
500
balance this equation: SiO2 + HCl -----> H2O + SiCl4
SiO2 + 4HCl -----> 2 H2O + SiCl4
500
If your equation has compounds with more than one mole, what do you have to remember to do when changing to grams?
Multiply the coefficient by the number of grams to get the total grams.
500
Why do chemists use uncertain digits, sig. figs. and scientific notation?
They use them to make the very big and little numbers simpler and more manageable and to account for the imprecision of instruments.
500
What is the difference between an unsaturated and saturated hydrocarbon?
Saturated means single bonds only and unsaturated means double or triple bonds- these can be broken to fill up with more hydrogens.
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