Search found 51 matches

by Anna Wu 1H
Tue Dec 03, 2019 3:41 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 9C.5
Replies: 4
Views: 44

Re: 9C.5

It depends on the shape and how many bonding sites they have available. for this question, you can check if the atoms have lone pairs.
by Anna Wu 1H
Tue Dec 03, 2019 3:34 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 9C5 (b)
Replies: 1
Views: 13

Re: 9C5 (b)

Dr. Lavelle sent out an email with a chemistry community link addressing this question. He explained it really thoroughly so I would just recommend reading that!
by Anna Wu 1H
Tue Dec 03, 2019 3:26 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Textbook 9C.9
Replies: 2
Views: 26

Re: Textbook 9C.9

part c) is 6 because there are 6 ligands = 6 attachments sites. There are 2 Cl atoms and 2 bidentate ligands. 2 bidentate ligands means that there are 4 attachment sites in total (2x2 = 4) so in total there are 2+4 = 6 attachments sites part d) is also 6 because hexadentate means there are 6 binding...
by Anna Wu 1H
Tue Dec 03, 2019 3:14 pm
Forum: Calculating the pH of Salt Solutions
Topic: Anion Exceptions
Replies: 3
Views: 19

Re: Anion Exceptions

Those are exceptions of anions not being able to act as acids. HSO4- and H2PO4- are deprotonated forms of H2SO4 and H3PO4 and can act as extremely weak acids.
by Anna Wu 1H
Tue Dec 03, 2019 3:10 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Naming
Replies: 2
Views: 16

Re: Naming

I think you should be able to tell based on the element's symbol on the periodic table
by Anna Wu 1H
Mon Nov 25, 2019 11:12 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Why do chemists like working with ammonia?


It's pretty basic stuff.
by Anna Wu 1H
Mon Nov 25, 2019 11:11 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Why does a hamburger yield lower energy than a steak?


Because it's in the ground state.
by Anna Wu 1H
Mon Nov 25, 2019 11:10 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What did the scientist say when he found two isotopes of Helium?



HeHe
by Anna Wu 1H
Mon Nov 25, 2019 11:09 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Did you hear that oxygen went on a date with potassium?

It went OK.
by Anna Wu 1H
Mon Nov 25, 2019 11:07 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

How often do i tell chemistry jokes?



Periodically
by Anna Wu 1H
Mon Nov 18, 2019 11:53 am
Forum: Resonance Structures
Topic: Bond length
Replies: 5
Views: 34

Re: Bond length

Yes, they are all the same.
by Anna Wu 1H
Mon Nov 18, 2019 11:52 am
Forum: Hybridization
Topic: Hybridization
Replies: 3
Views: 16

Re: Hybridization

The hybridization goes to 2p as well because it takes less energy to go to 2p rather than double up with another electron in the 2sp^2 orbitals. This also checks out with the molecular shape!
by Anna Wu 1H
Mon Nov 18, 2019 11:43 am
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE notation
Replies: 10
Views: 39

Re: AXE notation

AXE notation is helpful because if all molecules with the same AXE formula have the same molecular shape!
by Anna Wu 1H
Mon Nov 18, 2019 11:38 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Axial and Equatorial Lone Pairs
Replies: 1
Views: 33

Re: Axial and Equatorial Lone Pairs

Think about which and how many bonding pairs the lone pairs are acting with! If you're deciding between axial or equatorial placement, choose the orientation that minimizes repulsion, or interacts with the least number of bonding pairs. In terms of molecular shape, they aren't taken into account. On...
by Anna Wu 1H
Mon Nov 18, 2019 11:30 am
Forum: Student Social/Study Group
Topic: Topics on Test 2
Replies: 2
Views: 16

Re: Topics on Test 2

You also need to know sigma and pi bonds!
by Anna Wu 1H
Thu Nov 14, 2019 12:15 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Two atoms bump into each other.’I think I lost an electron.’ The other asks: ‘Are you sure?’ The first replies: ‘I’m positive.’
by Anna Wu 1H
Thu Nov 14, 2019 12:15 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Are you a diatomic molecule? Because you attract nothing.
by Anna Wu 1H
Thu Nov 14, 2019 12:14 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Chemical jokes are boron… however physics jokes have potential.
by Anna Wu 1H
Thu Nov 14, 2019 12:14 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Some guy tried to sell me sand for a thousand bucks yesterday. It was such a silicon.
by Anna Wu 1H
Thu Nov 14, 2019 12:13 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Hey know any good jokes about Sodium?



Na
by Anna Wu 1H
Mon Nov 11, 2019 12:54 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What is the chemical formula for sea water?





CH2O
by Anna Wu 1H
Mon Nov 11, 2019 12:54 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Why was the mole of oxygen molecules excited when he left the singles bar?






He got Avogadro's number!
by Anna Wu 1H
Mon Nov 11, 2019 12:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What element is a girl's future best friend?




Carbon.
by Anna Wu 1H
Mon Nov 11, 2019 12:53 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What did one charged atom say to the other?




I've got my ion you.
by Anna Wu 1H
Mon Nov 11, 2019 12:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What is the chemical formula of coffee?






CoFe2
by Anna Wu 1H
Fri Nov 01, 2019 5:23 pm
Forum: Properties of Electrons
Topic: Speed of electromagnetic radiation
Replies: 2
Views: 22

Re: Speed of electromagnetic radiation

Yes, the speed is always constant. This way, you can solve for the frequency of a wave given the wavelength and vice versa.
by Anna Wu 1H
Fri Nov 01, 2019 5:20 pm
Forum: Octet Exceptions
Topic: radical
Replies: 5
Views: 53

Re: radical

Free radicals fit into the octet rule because they are unpaired and thus, do not fit the octet or 8 valence electron standard.
by Anna Wu 1H
Fri Nov 01, 2019 5:18 pm
Forum: Dipole Moments
Topic: identification
Replies: 3
Views: 24

Re: identification

A dipole moment occurs between two atoms if there is a large difference in electronegativity.
by Anna Wu 1H
Fri Nov 01, 2019 5:15 pm
Forum: Dipole Moments
Topic: Week 6
Replies: 1
Views: 16

Re: Week 6

Yes
by Anna Wu 1H
Fri Nov 01, 2019 5:13 pm
Forum: Dipole Moments
Topic: direction of arrow
Replies: 2
Views: 18

Re: direction of arrow

Yes. The arrow should start from the electropositive atom and end at the electronegative atom.
by Anna Wu 1H
Thu Oct 24, 2019 4:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Exothermic Reactions? I studied them before they were cool.
by Anna Wu 1H
Thu Oct 24, 2019 4:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Why are chemists so good at solving problems?




They have all the solutions.
by Anna Wu 1H
Thu Oct 24, 2019 4:28 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

I told a good chemistry joke, but there was no reaction):
by Anna Wu 1H
Thu Oct 24, 2019 4:27 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

A neutron walks into a bar and asks, how much for a beer?
The bartender looks up and says, for you no charge.
by Anna Wu 1H
Thu Oct 24, 2019 4:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What do you do with a sick chemist?


If you can't Helium and you can't Curium, then you might as well Barium.
by Anna Wu 1H
Mon Oct 14, 2019 8:17 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Superman is a man. Batman is a man. Spiderman is a man. So why is Ironman a woman?





Because she is a Female.
by Anna Wu 1H
Mon Oct 14, 2019 8:15 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

A chemistry professor couldn't resist interjecting a little philosophy into a class lecture. He interrupted his discussion on balancing chemical equations, saying, "Remember, if you're not part of the solution, you're part of the precipitate!"
by Anna Wu 1H
Mon Oct 14, 2019 8:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What kind of fish is made of two sodium atoms?



2Na
by Anna Wu 1H
Mon Oct 14, 2019 8:13 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

What is HIJKLMNO?



H20!
by Anna Wu 1H
Mon Oct 14, 2019 8:09 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043368

Re: Post All Chemistry Jokes Here

Why did the white bear dissolve in water?




Because it was polar!
by Anna Wu 1H
Mon Oct 07, 2019 11:51 am
Forum: SI Units, Unit Conversions
Topic: Molar Ratio
Replies: 4
Views: 34

Re: Molar Ratio

The molar ratio can convert any one substance to any other substance as long as you know the ratio of one to another. Therefore, it applies to single compounds (ex: you can use mole ratios to find mass of H in given amount of H2O), or to an entire reaction (in which you would use the balanced equati...
by Anna Wu 1H
Mon Oct 07, 2019 11:47 am
Forum: Molarity, Solutions, Dilutions
Topic: G 25
Replies: 7
Views: 82

Re: G 25

You don't need to know the specific health benefits of the solution. What's important is if there's any active reagent, and since there isn't any remaining at the end, the solution would have no effect at all.
by Anna Wu 1H
Mon Oct 07, 2019 11:35 am
Forum: Properties of Light
Topic: Work Function
Replies: 4
Views: 49

Re: Work Function

The work function refers to the energy needed, while the threshold energy refers to the frequency of light needed. The two are the same in calculations.
by Anna Wu 1H
Mon Oct 07, 2019 11:32 am
Forum: Einstein Equation
Topic: Wavelengths
Replies: 5
Views: 86

Re: Wavelengths

The given energy is the threshold energy. Rearranging and combining the equations E=hv and c=vλ gives us λ=hc/E. plugging in the values into this equation gives the wavelength of light with sufficient energy.
by Anna Wu 1H
Mon Oct 07, 2019 11:27 am
Forum: Molarity, Solutions, Dilutions
Topic: G 11
Replies: 2
Views: 35

Re: G 11

Since the givens 0.278mol and 4.50mmol have 3 significant figures, then the answer should have 3 significant figures. The answer would be 0.0162
by Anna Wu 1H
Mon Oct 07, 2019 11:23 am
Forum: Limiting Reactant Calculations
Topic: Question about Calculating Limiting Reactants
Replies: 5
Views: 38

Re: Question about Calculating Limiting Reactants

Yes, as long as you use mole ratios from the balanced equations to compare the amount of moles of reactants.
by Anna Wu 1H
Tue Oct 01, 2019 10:36 pm
Forum: Molarity, Solutions, Dilutions
Topic: G 25
Replies: 7
Views: 76

Re: G 25

The amount of solute remains the same, but the volume changes. Since the solution is being diluted so dramatically, the 10 mL sample taken at the end has close to zero solute in it.
by Anna Wu 1H
Tue Oct 01, 2019 10:23 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Units in Answer
Replies: 18
Views: 143

Re: Units in Answer

The question usually specifies what unit you should put your answer in, but the general rule is if the givens are in grams, the answer should be in grams, and if the givens are in moles, the answer should be in moles.
by Anna Wu 1H
Tue Oct 01, 2019 9:55 am
Forum: Limiting Reactant Calculations
Topic: Textbook question M11
Replies: 1
Views: 31

Re: Textbook question M11

The answer for part B is 5.77g of P4O10 so your answer is correct. In order to solve part C, use the mass of the excess O2 for the second part of the reaction, and then divide that by the molar mass to find the number of moles of O2. Then, using the mole ratio of 1 mol P4O6 / 2 mol O2, convert moles...
by Anna Wu 1H
Tue Oct 01, 2019 9:39 am
Forum: Limiting Reactant Calculations
Topic: Homework Problem E9
Replies: 1
Views: 38

Re: Homework Problem E9

The formula is written as MgSO4·7H2O. Heptahydrate is important in writing the formula. If it's not included, you would calculate the wrong molar mass of the compound.
by Anna Wu 1H
Tue Oct 01, 2019 9:25 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Fundamental F Question 1
Replies: 2
Views: 29

Re: Fundamental F Question 1

The question is asking for the length of the fiber created by stringing together Ag atoms. To find the length, use the given radius, 144pm to find the diameter, how "long" the atom is, which is 288pm. This is how long one atom is. To find the length of 1.00mol Ag, first calculate the numbe...

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