Gas Law
If 45 mL of water are added to 250 mL of a 0.75 M K2SO4 solution, what will the molarity of the diluted solution be?
0.64 M
Balance this equation:
Na3PO4(aq) + AgNO3(aq) → NaNO3(aq) + Ag3PO4(s)
1, 3, 3, 1
A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00 atm, and 4.00 atm, respectively. What is the total pressure inside the container?
9.00 atm
What is the oxidation state of Nitrogen in N2O4
+4
A cylinder contains 28.5 L of oxygen gas at a pressure of 1.8 atm and a temperature of 298 K. How much gas (in grams) is in the cylinder? (R = 0.08206)
67g
Calculate the volume of 0.500 M NaCl needed to prepare 200 mL of a 0.150 M NaCl solution.
60.0 mL
What is the formula for Lead (II) sulfite?
PbSO3
If 60.0 L of nitrogen is collected over water at 40.0 °C when the atmospheric pressure is 760.0 mmHg, what is the partial pressure of the nitrogen in atm? (pressure of water at 40°C is 55.3 mmHg) (760 mmHg = 1 atm)
0.927 atm
Identify the species being reduced in the following reaction: 3 Hg2+ + 2 Fe (s) --> 3 Hg2 + 2 Fe3+
Hg2+
What is the density of N2 gas at a pressure of 1.80 atm at 300 K? (Hint: Assume 1.00 mol of N2 gas)
2.05 g/L
You have performed a titration on a 30.00 mL sample of HCl. To reach the endpoint of the titration, you added 40.78 mL of 0.130 M NaOH. How many moles of NaOH did you add?
5.30 X 10^-3 moles NaOH
After completing the reaction, write the net ionic equation. KI (aq) + Pb(NO3)2(aq) -->
Pb2+(aq) + 2I-(aq) --> PbI2(s)
A tank contains 5.00 moles of O2, 3.00 moles of neon, 6.00 moles of H2S, and 4.00 moles of argon at a total pressure of 1620.0 mmHg. What is the partial pressure of H2S in the tank?
540 mmHg or 0.711 atm
Identify the species being oxidized and reduced in the following reaction: 2 As (s) + 3 Cl2 (g) --> 2 AsCl3
As is oxidized; Cl2 is reduced
A gas is heated from 263.0 K to 298.0 K and the volume is increased from 24.0 liters to 35.0 liters by moving a large piston within a cylinder. If the original pressure was 1.00 atm, what would the final pressure be?
0.777 atm
3 Ag(s) + 4 HNO3(aq) → 3 AgNO3(aq) + NO(g) + 2 H2O(l)
(molar mass of Ag is 107.87 g/mol)
Name or write the proper formula for these acids (must get each part correct to receive credit): (a) HNO3 (b) carbonic acid (c) H2S
(a) nitric acid (b) H2CO3 (c) Hydrosulfuric acid
The oxygen gas emitted by an aquatic plant is collected over water at a temperature of 293K and a total pressure of 855.2 mmHg. A total of 2.50 L of gas is collected. What mass of oxygen gas is formed? (760 mmHg = 1 atm) (at 293 K, the pressure of water is 17.55 mmHg)
3.67 grams O2
A titration was performed based on the following equation:
H2C2O4 (aq) + KOH (aq) → K2C2O4 (aq) + H2O (l)
In this titration, 44.55 mL of KOH was added to neutralize 15.00 mL of 0.08000 M H2C2O4. What was the concentration (in M) of KOH in the sample?
0.05387 M KOH
Consider the unbalanced reaction:
Al + HBr → AlBr3 + H2
When 3.22 moles of Al reacts with 4.96 moles of HBr, how many grams of H2 are formed?
5.00 grams H2
A tank contains 480.0 grams of oxygen and 80.00 grams of helium at a total pressure of 7.00 atmospheres. Calculate (a) the mole fraction of He and (b) the partial pressure of O2. Must complete both parts to get credit for question
(a) 0.571 (b) 3.00atm