Miscellaneous 1
The total pressure of three gasses is 475 torr. If the partial pressure of the first gas is 124 torr and the partial pressure of the second gas is 220 torr, what is the partial pressure of the third gas in torr?
131 torr
What is the atomic number of an element?
The number of protons in the element
If an atom goes from a neutral charge to a +3 charge, what must have happened?
It lost/gave away 3 electrons
What is the difference between precision and accuracy?
Precision: the ability to obtain answers/values that are similar to one another
Accuracy: the ability to obtain answers/values that are close to the theoretical value
What is the definition of an independent variable and a dependent variable?
IV: The variable that is changed in an experiment, the input (x-axis)
DV: the variable that is observed in an experiment, the output (y-axis)
What is the correct IUPAC name for NH4CO3
Ammonium Carbonate
Of the following techniques, which would be best for filtering a solid from a liquid so that you may keep the liquid?
Titration, Filtering, vaporization, neutralization
Filtering
What are all of the differences between an ionic bond and a covalent bond? (What types of elements are involved, how are electrons involved)
Ionic: Metal + nonmetal, electrons are transferred
Covalent: Nonmetal + Nonmetal, Electrons are shared
Acids and ionic bonds have a tendency to form electrolytes in solutions. What is special about a solution that has electrolytes dissolved in it?
The solution can conduct electricity
Based on the following pH values, which substance is slightly acidic?
Water: 7
Baking Soda: 9
Coffee: 5
Lemon Juice: 2
Coffee
If the electron configuration of Al is 1s22s22p63s23p1, what is the electron configuration of Al3+
1s22s22p6
What experiment discovered the electron?
Cathode Ray Tube
What experiment concluded that the atom is made up of mostly empty space?
Gold Foil Experiment
What are the 6 different types of reactions?
Synthesis, Decomposition, Single Replacement, Double Replacement, Combustion, Neutralization (Acid-Base)
What does each family on the periodic table have in common?
Chemical properties and/or valence electrons (These two are essentially the same thing)
What type of reaction is the following reaction?
HNO3 +KOH --> H2O + KNO3
Acid-Base or Neutrilization
How many grams of CaCO3 are in a 2.14 M solution dissolved in 0.8 L of solvent?
171 g CaCO3
590 J
If three substances are heated with the same amount of energy which substances temperature would increase the most if the specific heats if the substances are 0.673 J/g*oC, 0.548 J/g*oC, and 0.823 J/g*oC
Substance 2 (0.548 J/g*oC)
How many grams of sulfur would be required to react with 95 g of Fe
2Fe + 3S --> Fe2S3
82 g S
According to Boyles Law, at constant temperature, what happens to the volume of a gas as pressure increases
Volume decreases
What is the IUPAC name for the compound FeBr3?
Iron (III) Bromide
According to Charles Law, at constant pressure, what happens to the volume as temperature increases
Volume increases
What is the IUPAC name for the compound MgCl2?
Magnesium Chloride
Which one of the three following molecules is polar?
CH4, CH3Cl, CO2
CH3Cl