General Questions 1
General Questions 2
Moles & Molar Mass
Concentrations
Gas Laws
Equations
100
The net movement of water through a semipermeable membrane is?
Osmosis
100
Which of the following is the strongest force between molecules?
Hydrogen Bonds
100
Tetracycline is a commonly used antibiotic. How many moles of hydrogen are in one mole of tetracycline (C22H24N2O8)?
24
100
Tanya adds 25 g of glycerol to 125 g of water. What is the mass/mass (m/m) percent of the solution?
20% (exact)
100
The volume of an oxygen (O2) tank changed from 16.5 L to 33.0 L with a starting pressure of 250. torr, what is the new pressure in torr at constant temperature (T) an amount (n)?
125 (exact required)
100
In the reaction below, how many moles of iron (Fe) are needed to form 6.4 moles of iron (III) oxide (Fe2O3)?
4 Fe + 3 O2 → 2 Fe2O3
12 to 13
200
Which of the following statements does NOT describe reduction?
Loss of Electrons
Gain of Electrons
Loss of Oxygen
Gain of Oxygen
Loss of Electrons
200
What type of reaction is the following reaction?
CaCl2 + K2SO4 → CaSO4 + 2KCl
Double replacement
200
Glucose (C6H12O6) is the only source of energy for the cells in our brains, What is the molecular weight (molar mass) of glucose?
180-185
200
Nishant adds 13 mL of NH4OH to water with a final volume of 115 mL. What is the volume/volume (v/v) percent of the solution?
11% to 12%
200
A tank of helium (He) has a volume of 120.0 L at a temperature of 32.0 °C. What will the volume be in liters (L) if the temperature increases to 327.0 °C at constant pressure (P) and amount (n)?
235-240
200
Balance the following chemical equation:
______ Na2CO3 + ______ HCl → _______ NaCl + _______ H2CO3
1 Na2CO3 + 2 HCl → 2 NaCl + 1 H2CO3
300
How many electrons does an ion have that has 26 protons and a +3 charge?
23 electrons
300
Name the following ionic molecule: Cu2CO3?
Copper (I) carbonate
300
Thyroxine (C15H11I4NO4) is a hormone produced by the thyroid to regulate metabolism. What is the molecular weight (molar mass) of thyroxine?
755 to 780
300
Zoe makes a 850 mL solution that contains 22 grams (g) of KOH, what is the weight/volume (w/v) percent of this solution?
2.5% to 3%
300
A tank of nitrous oxide (N2O) has a pressure of 370. torr at 10.0 °C. If the temperature increases to 65.0 °C, what is the new pressure in torr at a constant volume (V) and amount (n)?
441-445
300
In the reaction below, how many grams of iron (Fe) are needed to form 100.4 grams of iron (III) oxide (Fe2O3)?
4 Fe + 3 O2 → 2 Fe2O3
70 to 72
400
What is the name of the following covalent molecule: S2F10?
Disulfur decafluoride
400
Inspiration is the process of breathing in air. Which best describes inspiration?
Diaphragm relaxes and rib cage relaxes
Diaphragm contracts and rib cage relaxes
Diaphragm contracts and rib cage expands
Diaphragm relaxes and rib cage expands
Diaphragm contracts and rib cage expands
400
Dihydrogen monoxide (H2O) is the main component of acid rain. How many grams of dihydrogen monoxide are in 15.7 moles?
280 to 284
400
Ian wants to make 350.0 mL of a 4.25 M KOH. How many grams of KOH must he add?
83-85 grams
400
An oxygen (O2) tank has a new volume of 220.0 L at a pressure of 700. mmHg and at a temperature of 90.0 °C. What was the original temperature in degrees Celsius (°C), if the volume started at 165.0 L with a pressure of 766. mmHg at a constant amount (n)?
24 to 26
400
How many grams of aluminum oxide (Al2O3) are generated 75 grams of oxygen (O2) in the reaction below?
4 Al + 3 O2 → 2 Al2O3
159 to 160
500
List 3 conditions that must exist for a reaction to occur?
The reactants must collide
Reactants must align properly
The collision must provide energy
500
Give the four parts of the Molecular Kinetic Theory of Gas.
Particles move rapidly in straight lines
Particles have essentially no attractive or repulsive forces
Particles are very far apart
Their kinetic energies increase with an increase in temperature
500
Magnesium hydroxide (Mg(OH)2) is commonly found in antacids. If a single dose of magnesium hydroxide is 15 grams, how many moles of magnesium hydroxide are in a single dose?
0.24 to 0.3
500
Les added 15.0 mL of a 0.50 M KOH solution and brought the final volume up to 100.0 mL. What is the final concentration of this new solution in millimolar (mM)?
75 (exact)
500
An oxygen (O2) tank has a new volume of 27.0 L at a pressure of 150. mmHg and at a temperature of 125.0 °C. What was the original temperature in degrees Celsius (°C), if the pressure was to 110. mmHg and the volume was 26.0 L at a constant amount (n)?
8 to 10
500
Balance the following chemical equation:
_____ Hg(OH)2 + _____ H3PO4 → _____ Hg3(PO4)2 + _____ H2O
3 Hg(OH)2 + 2 H3PO4 → 1 Hg3(PO4)2 + 6 H2O