Unit 1
Calculate the density of 0.294 mol N2 gas contained in a 6.60 L vessel terms of 'grams per liter'
1.25g/L
List the sections of the electromagnetic spectrum in order from highest to lowest energy
gamma → x-ray → ultraviolet → visible → infrared → microwaves → radio waves
Give the term to this definition:
Solute or solution that is an electrolyte that completely dissociates in solution
Strong electrolyte
What is a limiting reactant?
The reactant in a chemical reaction that determines the amount of product that is formed
Who has the most followers on TikTok?
Charli D'Amelio
When dry ice (solid CO2) sublimates, is energy absorbed or released by the dry ice?
Absorbed
What is the frequency of electromagnetic radiation having a wavelength of 210.0 nm?
1.429 x 1015 s-1
What is the correct name for the compound, CrBr3•6H2O?
chromium(III) bromide hexahydrate
Explain why orientation is important when particles collide to react
It is important that particles must collide in a proper orientation for it to be an effective Collison. That is because the proper atoms line up with one another, and bonds can break and re-form in the necessary fashion. For example, in the gas-phase reaction of dinitrogen oxide with nitric oxide, the oxygen end of N2O must hit the nitrogen end of NO; if either molecule is not lined up correctly, no reaction will occur upon their collision, regardless of how much energy they have
What is the name of the crab in Disney's The Little Mermaid?
Sebastian
1) Any macroscopic sample of a substance is composed of a large number of very small particles
2) Parties are constantly moving in random directions through empty space
3) Particles interact with each other
What is the electron configuration for copper (Cu)
1s2 2s2 2p6 3s2 3p6 4s1 3d10
Which, if any, of the following molecules would not be soluble in an aqueous environment?
K2S
AgCl
AgCl (EXCEPTION!)
The combustion of ethanol has the following reaction:
C2H5OH(l)+3O2(g)⟶2CO2+3H2O(l)
How many molecules of oxygen are needed to fully combust 20g ethanol?
7.84x1023 molecules of O2
When is your chemistry final?
3-5 pm Monday, Dec. 14
Determine the empirical and molecular formula of styrene given the following information:
92.3% C (12.01 amu)
7.7% H (1.008 amu)
Molar mass: 104 g/mol
Empirical: CH
Molecular: C8H8
What are the electron and molecular geometries of OF2. What are the bond angles
(hint: think about other components of the elements attached to the central atom)
EDG: Tetrahedral
MDG: bent
Bond angles: <109.5o
What types of forces does CH2Cl2 have?
Dispersion and dipole-dipole
A reaction whose collision effectiveness favors the forward reaction but whose energy of activation favors the reverse reaction would be favor the (products/reactants) at (high/low/room temp).
Hint: draw it out
Product favored at high temperatures.
What is my favorite color?
Naturally occurring magnesium has the following isotopic abundances. What is the average atomic mass of Mg?
24Mg: Abundance=78.99% Atomic Mass=23.98504amu
25Mg: Abundance=10.00% Atomic Mass: 24.98584amu
26Mg: Abundance=11.01% Atomic Mass: 25.98259amu
24.31 amu
Does BF3 have a dipole moment? Where are the dipole(s) pointing?
No, individual diples balance out with heads of arrows pointing towards the folourines.
As cross-linking within a polymer increases, would we have to input more or less energy to melt it?
More energy because greater crosslinking makes the molecule more stable
When benzene (C6H6) reacts with bromine (Br2), bromobenzene (C6H5Br) is obtained:
C6H6 + Br2 ===>C6H5Br + HBr
When 30.0 g of benzene reacts with 65.0 g of bromine, what is the theoretical yield of bromobenzene?
60.3g bromobenzene
How much does a blue whale weigh?
110,000-330,000 lbs