Waves
What is the equation relating wavelength and frequency?
wavelength * frequency = speed of light.
There are 137 students in chemistry class. How many sig figs is that.
Infinite
What is the base unit of mass?
Kilogram
How many protons do all of the isotopes of carbon have?
6
When you observe a solution change colors during a chemical reaction, what domain of chemistry is this?
Macroscopic
What is the equation relating Energy and Frequency.
E=hv
How many sig figs does 2 have?
1
How many picoseconds are there in 1 second?
1*1012
If the charge of an ion is 2+, did the atom gain or lose electrons?
Lose
True or False: According to the law of conservation of mass, mass cannot be created or destroyed unless it is during a chemical reaction.
False
-
CF4
2
Convert 5000 cm3 to liters.
5L
How many Protons, Electrons, and Neutrons does a neutral Carbon-14 atom have?
Protons: 6
Electrons: 6
Neutrons: 8
1) What is the unit of frequency?
2) What is the unit of Energy?
1) 1/s or Hertz
2) Joules (J)
-
Carbonic Acid
How many sig figs is 123.4 * 56?
2
How many Kelvin is 32o Fahrenheit?
273.15 K
An ion has a charge of -2. This ion has 10 electrons. What element is this?
Oxygen
Classify Salt Water as:
a) A Mixture or Pure Substance.
b) element, compound, heterogenous, or homogenous.
a) Mixture
b) Homogeneous
What is the wavelength of light if it has 1 Joule of Energy?
1.9878*10^-25 meters
How may sig figs is (25.43*746) + 0.5445?
3
Convert 5m3 to cm3.
5*106 cm3.
There is an element with two naturally occurring isotopes. The masses of the two isotopes are 35 amu and 37 amu. What element is this?
A) Phosphorous
B) Sulfur
C) Chlorine
D) Argon
C) Chlorine - amu 35.45.
Which one weighs more
- A mole Carbon Atoms
- One Lead Atom
- A mole of Marshmallows
- 2 or more weigh the same
A mole of marshmallows