Atomic Structure
How many Protons, Neutrons, and Electrons are in
Cl-37, an isotope of chlorine
Protons: 17
Electrons: 17
Neutrons: 20
What is the mole to mole ratio between carbon dioxide and oxygen:
2C2H5OH + 6O2 --> 4CO2 + 6H2O
What is 4:6
STP means what? Include numbers
Standard Temperature and Pressure
273K and 1atm
Name the molecule: Fe3(PO4)2
What is
Iron (III) Phosphate
Which metal will heat up the fastest?
Silver- 0.345j/gc
Gold- 0.121 j/gc
Pt- 0.652 j/gc
Silver
What did J.J thompson Discover and how did his experiment work?
Discovered negative particles
used a beam of particles that were deflected towards the positive cathode
A compound is found to contain 23.3% magnesium, 30.7% sulfur, and 46.0% oxygen. What is the empirical formula of this compound?
MgSO3
A sample of argon gas at STP occupies 56.2 liters. Determine the number of moles of argon
2.5 moles
On your whiteboard, draw the molecule SiO2.
What is the molecular geometry of SiO2
O=Si=O
Linear
what type of change is the following (physical or chemical)
NaCl(s) -- NaCl(aq)
physical.
Dissolving (becoming aqueous) is a physical change
Write the electron configuration for Si+4
1s2 2s2 2p6
Calculate the number moles in 23g of C2H5OH
0.5 moles
Which gas has a faster velocity:
Ar or Ne
Ne
Which molecule would have the LOWEST boiling point?
CH4
NH3
H2O
HCl
What is CH4
(only has london dispersion forces)
What type of matter do "pure substances" include
compounds & elements
Calculate the molar mass of a compound if there are three isotopes with masses 24amu, 26amu, and 29amu with respective abundances of 22.4%, 33.4%, 44.2%.
26.8
Calculate the number of grams of CO2 produced if 12 grams of O2 are used in the reaction
2C2H5OH + 4O2 ---> 2CO2 + 6H2O
what is 8.25g CO2
Four balloons, all at STP contain 4 moles of gas, but contain different gases: Ar, Ne, He, and H2. Which balloon has the largest volume
None.
They are all the same volume
Write the formula for the molecule formed by Aluminum and Nitrate
What is Al(NO3)3
Why and when do we see colored light during the flame test
We see light when the electron returns to the ground state and emits the energy as light.
Write the electron configuration of an element from the 3rd period and the 7th group
1s2 2s2 2p6 3s2 3p5
What is the percent composition of N in NO2
if a balloon at STP is taken to a depth in the ocean that is half the temperature, but triple the pressure, how much will the volume change?
Identify all IMFs present in the molecule CO2
What is London Dispersion Forces
What elements are necessary for hydrogen bonding to be present
NH
OH
FH