What is the difference between a physical change and a chemical change?
A chemical change involves the the production of a new substance through a chemical reaction. A physical change is just a change in form.
Which subatomic particle is involved in bonding? Be specific!
Valence electron
What property of atoms corresponds to its group number?
Number of valence electrons
Which type of bond is described as a two nonmetals sharing valence electrons?
Covalent Bond
What type of reaction is described as a single reactant breaking into two or more products?
Decomposition Reaction
Which state of matter has a fixed volume but no definite shape?
Liquid
What unit is thermal energy measured in?
Joules
Name two presidents born in Massachusetts
John Adams
John Quincy Adams
John F. Kennedy
George W. Bush
How many significant figures are in the number below:
0.005020
4
Which subatomic particle varies between isotopes of the same element?
Neutron
What element is found in period 4, group 7?
Manganese (Mn)
What is the name of the following compound?
Cu3(PO4)2
Copper (II) Phosphate
What is the symbol for aqueous and what does it mean?
(aq)
Aqueous means a substance dissolved in water
If a fixed amount of gas at a constant volume gets heated up, what would happen to its pressure?
Pressure would increase
Gay-Lussac's Law
If a reaction occurring in a calorimeter causes the temperature of the water to increase, what type of reaction took place: endothermic or exothermic?
Exothermic
What are the first 9 numbers of pi?
3.14159265
Which of the following is NOT an example of a mixture?
A) corn starch C) Pizza
B) Salad D) Air
A) Corn Starch
Define "cation"
An atom that has lost an electron and has a positive charge
What family is found in the middle of the periodic table?
Transition Metals
Which of the following compounds would have the highest boiling point?
A) H2O C) HCl
B) CH4 D) FeO
D) FeO
Balance the following equation:
__ NH3 + __ O2 --> __ N2 + __ H2O
4 NH3 + 3 O2 --> 2 N2 + 6 H2O
Which phase change is being described below?
A substance with a fixed particle arrangement and low kinetic energy absorbs enough heat energy to overcome its attractive forces and its particles begin to flow around one another.
Melting
Substance A has a specific heat of 1.2 J/gC and Substance B has a specific heat of 2.4 J/gC. If both substances both gain 1000 J of energy, which substance would have the higher final temperature?
Substance A
Who won the first season of Survivor in 2001?
Richard Hatch
If 80 mL of maple syrup has a mass of 109.6 g, what is the density of maple syrup?
109.6 g / 80 mL = 1.37 g/mL
What is the charge of Oxide?
-2
Fluorine
What type of bond would form from a compound made of two elements with electronegativities of 3.8 and 1.2?
A) Ionic C) Metallic
B) Covalent D) Ionic or Covalent
A) Ionic
K2O + CO2
How many grams of carbon dioxide are present in 500 L at 2.0 atm and 300 K?
PV = nRT
(2)(500) = n(0.0821)(300)
n = 40.6 mol x 44 g/1 mol =
1786.4 g H2
Identify the three types of heat transfer that we have learned and an example of each.
Conduction - anything in which heat is transferred through direct contact
Convection - anything in which heat is transferred due to the movement of a fluid
Radiation - anything in which heat is transferred without direct contact
Most of you were born in either 2007 or 2008. Name the Chinese animal for at least one of these years. (extra 200 points if you get both).
2007 - pig
2008 - rat
A student takes the following measurements:
73.1 mL, 72.4 mL, 74.8 mL, 73.9 mL
The true value of this experiment is 72.8 mL, what is the percent error if the student takes the average of their measurements.
(73.1 + 72.4 + 74.8 + 73.9) / 4 = 73.55 -> 73.6
(73.6 - 72.8) / 72.8 = 1.10%
An atom with 12 protons, 14 neutrons, 13 electrons...
A) has a positive charge
B) has a mass number of 26
C) Has an atomic number of 14
B) has a mass number of 26
What is special about Noble Gases?
They generally do not make bonds due to having eight valence electrons in their outer energy level.
Draw the lewis structure for HNO
Write a balanced equation is which a precipitate is formed
Answers may vary
How many grams of Oxygen gas are present in 15 liters at STP?
15 liters x 1 mol/22.4 L x 32 g/1 mol = 21.4 g
Draw a picture of a calorimeter and explain how they work and what they measure
A calorimeter surrounds a system with water.
Calorimeters measure the change in energy in a reaction by measuring the change in temperature of water.
Even though it doesn't exist, the unicorn is the national animal of what country?
Scotland