Chapter 1
What is the difference between a homogenous mixture and a heterogenous mixture?
Bonus Points:
Give an example of each.
A homogenous mixture is where substances are distributed uniformly.
A heterogenous mixture is where substances are not distributed uniformly.
What subatomic particles have about the same mass?
protons and neutrons
True or false:
Photons are emitted when electrons move from higher to lower energy levels.
True
What is the chemical formula for lead (II) fluoride?
PbF2
How many pi bonds are there in ozone (O3)?
1
How many significant figures does the value 0.0006700 have?
4
What is an isotope?
Isotopes are atoms of an element containing the same number of protons but different numbers of neutrons.
How many unpaired electrons will there be in a neutral, ground state potassium atom?
1
Which of these molecules contains a double bond?
A. N2
B. S2
C. CCl4
B. S2
Is NH3 polar or nonpolar?
Polar
What is 550nm in meters using exponential notation?
5.5 x 10-7
What is the number of protons, neutrons, and electrons for copper - 66?
Protons: 29
Neutrons: 37
Electrons: 29
What is the energy emitted in Joules of an Nd laser with a wavelength of 1064 nm?
1.87x10-25 Joules
Which is true about the relationship between bond length and bond strength?
A. they are unrelated
B. directly proportional
C. inversely proportional
C. Inversely proportional
How many sigma bonds are there in CH2O?
3
What is potential energy and what is kinetic energy?
Potential energy is the energy stored in an object because of it's composition or position.
Kinetic energy is the energy used in motion.
Which of the following is a transition metal?
A. Rubidium (Rb)
B. Copper (Cu)
C. Aluminum (Al)
B. Copper (Cu)
In the diagram of an atom, what is an orbital?
An orbital is a three dimensional area where an electron is most likely to be found.
What is the correct formula for ammonium sulfate?
(NH4)2(SO4)
What is the molecular geometry for BF3?
Trigonal Planar
What is the kinetic energy of an oil tanker with a mass of 3 x 107 traveling at 9 m/s (20 miles per hour)?
Formula:
KE = 1/2mu2
m: mass, u: velocity
1,215,000,000 Joules
One isotope makes up 97% of all calcium atoms. Which one is it?
A. Ca - 40
B. Ca - 42
C. Ca - 43
D. Ca - 44
A. Ca - 40
What is the condensed electron configuration of Si?
[Ne] 3s2 3p2
What is the name for HIO3?
Iodic acid
Draw the Lewis Structure for (ClO4)-
Look at Chapter 5 Quiz question 1.