Unit 6 The Mole
Unit 7 Chemical Reactions
Unit 8 Stoichometry
Unit 9 Solutions
Unit 10 Colligative Properties
100
How many Oxygen atoms are in 0.5 moles of sulfate (SO4).
1.204 x 10^23 atoms of Oxygen
100
Write the Chemical Equation when Oxygen reacts with hydrogen to produce Water.
H2 + O2 ----> H2O
100
The reactant that is completely used up during the mixing of 2 compounds is called the what reactant?
The limiting reactant
100
Substance that is being dissolved.
Solute
100
Does the Colligative Property increase or decrease when more solute particles are added?
The Colligative Property increases.
200
The mass of exactly one mole of atoms of an element which is provided on the periodic table.
Atomic mass
200
Balance the following equation. __Zn + __HCl ---> __ZnCl2 + __H2
Zn + 2HCl --> ZnCl2 + H2
200
How many atoms are in 0.48 moles of iron?
2.89 x 10^23 atoms
200
What is the molarity of a solution dissolved in 15.0 grams of sodium hydroxide to make a total of 225 milliliters of solution?
.375 moles of Sodium Hydroxide
200
What is the boiling point elevation when 11.4 grams of ammonia is dissolved in 200 grams of H2O? The Kb for water is 0.52 degrees C / m.
The change in boiling point elevation is 1.74 degrees Celsius.
300
Determine the amount of moles of Carbon dioxide in 300 grams of CO2
6.82 moles of CO2 are in 300 grams of CO2
300
Use Double Replacement to solve for MgBr2 + Ca3(PO4)2 and remember to balance the final equation.
3MgBr2 + Ca3(PO4)2 → Mg3(PO4)2 + 3CaBr2
300
Ethane undergoes combustion. Write the balanced equation for this including states of matter.
2 C2H6(aq) + 7 O2(aq) → 4 CO2(g) + 6 H2O(l)
300
Calculate the volume of 5M H2O that must be diluted with water to produce 500mL of 5.4M H2O.
540mL is the volume
300
Calculate the freezing point of 0.1 m solutions in water of NaCl and BaCl2.
-.372 Degrees Celsius is the freezing point for NaCl -.558 Degrees Celsius is the freezing point for BaCl2
400
What is the volume of 0.5 moles of SO2 at STP?
12.2 Liters of SO2
400
Determine if this substance is soluble or insoluble.
TiO2
400
What is the percent yield In the equation shown below, if the reaction of 46.2 grams of Li3N produces 16.5 grams of N2? 2Li3N=>6Li+N2
88.6% percent yield
400
What is the molality if you had 2.00 moles of solute dissolved into 1.00 L of solvent.
The molality is 2 or 2 m
400
What are the three colligative properties?
Vapor Pressure Freezing Point Boiling Point
500
What is the empirical formula for a compound that contains 26.56% potassium, 35.35% chromium, and 38.07% oxygen?
K2Cr2O7
500
Write the total ionic equation for SrBr2 (aq) + K2SO4 (aq) SrSO4 (s) + 2 KBr (aq)
Sr^2+(aq) + SO4^2- --> SrSO4(s)
500
Calculate the mass of Hydrogen needed to react with excess Oxygen to produce 18.00 grams of H2O (water).
36.28 grams of Hydrogen
500
Find the mole fractions if you have 250 grams of NaCl and 1500 grams of H2O
The mole fraction for H2O is 0.95 and 0.05 for the mole fraction of NaCl
500
What is the Van't Hoff factor for this equation: MgCl2 → Mg^2+ + 2 Cl^-
3 ions so the Van't Hoff factor is 3.
M
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