Shape and Polarity
What is the geometry of H2O and is it polar?
bent, yes
What is the balanced reaction using the following reactants?
Na + CaO
2 Na + CaO --> Na2O + Ca
2.00 moles of calcium oxide react with 4.00 moles of sodium bromide. How many moles of sodium oxide are produced?
2.00 moles
The volume of a 1.76 moles of a gas in a container was 580.0 mL. What would the volume inside the container be if 2.20 moles of the gas was in it?
725 mL
Determine whether each scenario would cause the percent yield to be over 100% yield, under 100% yield, or have no effect on the percent yield:
You let your reaction happen for way longer than you needed to.
No effect
What is the geometry of CO32- and is it polar?
Trigonal planar, no
What is the balanced reaction using the following reactants?
Na2CO3 + KCl
Na2CO3 + 2 KCl --> K2CO3 + 2 NaCl
22.4 L of oxygen gas react with excess methane at STP. How many liters of CO2 are produced?
11.2 L
8.98 cm3 of hydrogen gas is collected at 38.8 °C. Find the volume the gas will occupy at -38.8 °C if the pressure remains constant.
6.75 cm3
Determine whether each scenario would cause the percent yield to be over 100% yield, under 100% yield, or have no effect on the percent yield:
You use a dry graduated cylinder to measure 20 mL of your reactant. You then rinse the graduated cylinder with distilled water and pour it into your reaction vessel with the rest of the reactant.
No effect
What is the geometry of CBrIClF and is it polar?
tetrahedral, yes
What is the balanced reaction using the following reactants?
KCl + Br2
2 KCl + Br2 --> 2 KBr + Cl2
H2CO3 decomposes into water and carbon dioxide. If you started with 1.00 g of H2CO3, what is the mass of both of the products combined?
1.00 g
Law of Conservation of Mass
You titrate 60.00 mL of acetic acid with 8.50 mL of 6.800 M sodium hydroxide, where the titration reaches the equivalence point. What was the concentration of the acetic acid?
0.963 M
Determine whether each scenario would cause the percent yield to be over 100% yield, under 100% yield, or have no effect on the percent yield:
You filter and rinse your product and leave it to dry for the weekend. By the time you get back to weigh it, you notice that it has oxidized (reacted with the air).
Over
Which has the highest boiling point:
O2
S2
Se2
Se2
What is the balanced reaction using the following reactants?
hexanol + O2
C6H13OH + 9 O2 --> 6 CO2 + 7 H2O
An iron bar has completely rusted to form Fe2O3. You weight the rusted bar and it has a mass of 113.4 grams. Assuming there was excess oxygen, what was the mass of the original bar of iron?
79.4 g
Phenolphthalein is pink when something is acid or basic?
basic
Determine whether each scenario would cause the percent yield to be over 100% yield, under 100% yield, or have no effect on the percent yield:
You rinse a graduated cylinder with water and immediately measure use it (before it has a chance to dry) to measure 10 mL of your reactant.
Under
Which has the lowest boiling point:
C4H10
C12H26
C30H62
C4H10
What is the balanced reaction using the following reactants?
HCl + Mg
2 HCl + Mg -->H2 + MgCl2
70.0 mL of 3.00 M NaCl is mixed with 30.0 mL of 4.00 M AgNO3. How many grams of AgCl are produced?
17.2 g AgCl
147 grams of H2CO3 decomposes into water and carbon dioxide. If this occurs at 25oC and 1.50 atm, how many liters of CO2 are produced?
38.66 L
On the planet Xorgon, you encounter a unique dye that appears to have unusual properties. To learn more about it, you perform chromatography. The stationary phase is water and the mobile phase is isopropyl alcohol. At the end of the experiment, the dye has moved to the top of the paper. Is it polar or nonpolar?
nonpolar