Search found 30 matches

by sarahartzell1k
Thu Dec 06, 2018 11:11 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: H30+ and H+
Replies: 4
Views: 33

Re: H30+ and H+

H+ does not usually exist as a single proton and binds with water.
by sarahartzell1k
Thu Dec 06, 2018 11:10 pm
Forum: Photoelectric Effect
Topic: Work Function
Replies: 14
Views: 206

Re: Work Function

Use the equation EK = h v - workfunction to solve.
by sarahartzell1k
Thu Dec 06, 2018 11:09 pm
Forum: Bronsted Acids & Bases
Topic: Glucose as an acid
Replies: 3
Views: 19

Re: Glucose as an acid

I do not think it is either, as well.
by sarahartzell1k
Fri Nov 30, 2018 7:32 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability
Replies: 5
Views: 42

Re: Polarizability

When it is highly polarizable, this means its electron cloud has a higher chance of being distorted, usually because of the size of the anion.
by sarahartzell1k
Fri Nov 30, 2018 7:31 am
Forum: Hybridization
Topic: hybridization notation
Replies: 3
Views: 34

Re: hybridization notation

The 2 refers to the energy level of the orbital.
by sarahartzell1k
Fri Nov 30, 2018 7:29 am
Forum: Determining Molecular Shape (VSEPR)
Topic: bond angle
Replies: 6
Views: 45

Re: bond angle

Since you cannot know the exact angle, <120 is acceptable.
by sarahartzell1k
Fri Nov 30, 2018 7:29 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone pairs
Replies: 3
Views: 42

Re: Lone pairs

Lone pairs have a larger volume of space whereas the electrons on the atoms are more restricted by the bonds so the repulsion is less.
by sarahartzell1k
Fri Nov 30, 2018 7:28 am
Forum: Sigma & Pi Bonds
Topic: Sigma bonds
Replies: 6
Views: 51

Re: Sigma bonds

Sigma bonds overlap on top of each other.
by sarahartzell1k
Fri Nov 30, 2018 7:27 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: test #3
Replies: 14
Views: 168

Re: test #3

You should know the bond angles. Also, it helps to follow the outlines he posted as to what is on the test.
by sarahartzell1k
Thu Nov 15, 2018 4:52 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 10
Views: 110

Re: Formal Charge

It is important to pay attention to the formal charge as not all elements adhere to the octet rule.
by sarahartzell1k
Thu Nov 15, 2018 4:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Double Bonds in VSEPR
Replies: 5
Views: 32

Re: Double Bonds in VSEPR

The double bond will still be considered one area of electron density so there is no difference in the model.
by sarahartzell1k
Thu Nov 15, 2018 4:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Planar vs Pyramidal
Replies: 3
Views: 26

Re: Planar vs Pyramidal

Even if the atoms are different, it will still be planar.
by sarahartzell1k
Thu Nov 08, 2018 10:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR
Replies: 2
Views: 79

Re: VSEPR

Look at bonding electrons and lone pairs of electrons around the central atom. Sulfur has four bonds and one lone pairs of electrons, so the formula is AX4E which corresponds to the see-saw shape
by sarahartzell1k
Thu Nov 08, 2018 10:06 pm
Forum: Octet Exceptions
Topic: Octet vs formal charge
Replies: 15
Views: 143

Re: Octet vs formal charge

It is important to make sure the formal charge is as accurate as possible but always be aware of the octet rule and its exceptions
by sarahartzell1k
Mon Nov 05, 2018 12:56 pm
Forum: DeBroglie Equation
Topic: work function and frequency
Replies: 4
Views: 94

work function and frequency

How do you calculate the frequency of an incident light when given the wavelength and work function (for example: if the wavelength of the ejected electron is 1.1 nm, what was the frequency of the incident light? The work function of sodium is 150.6 kj mol-1)
by sarahartzell1k
Fri Nov 02, 2018 7:45 am
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent Bonds
Replies: 18
Views: 154

Re: Ionic vs Covalent Bonds

Ionic bonds involve the transfer of electrons while in covalent bonds the electron is shared
by sarahartzell1k
Fri Nov 02, 2018 7:43 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Degenerate orbitals
Replies: 3
Views: 49

Re: Degenerate orbitals

Degenerate orbitals are orbitals that have the same energy level
by sarahartzell1k
Fri Nov 02, 2018 7:39 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Is electron removed from 3d or 4s first?
Replies: 5
Views: 212

Re: Is electron removed from 3d or 4s first?

The electron will be removed from 4s first since 3d has slightly higher energy.
by sarahartzell1k
Thu Oct 25, 2018 5:46 pm
Forum: Properties of Electrons
Topic: mass of electron
Replies: 5
Views: 121

Re: mass of electron

It might be faster when doing calculations to memorize the value, however, most constants and equations can be found on a reference sheet during an exam.
by sarahartzell1k
Thu Oct 25, 2018 5:44 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty of an Electron's Velocity & Speed of Light
Replies: 4
Views: 121

Re: Uncertainty of an Electron's Velocity & Speed of Light

Nothing can go faster than the speed of light, so since the model shows the velocity of the electron as being faster, it was disproved.
by sarahartzell1k
Thu Oct 25, 2018 5:27 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 14
Views: 214

Re: E=hv

E represents the energy of the photon but you can also use this equation to find the energy needed to remove the electron, just remember to pay attention to kinetic energy.
by sarahartzell1k
Thu Oct 18, 2018 5:00 pm
Forum: Photoelectric Effect
Topic: Speed of Light
Replies: 5
Views: 76

Re: Speed of Light

Nothing can travel faster than the speed of light.
by sarahartzell1k
Thu Oct 18, 2018 4:56 pm
Forum: DeBroglie Equation
Topic: units
Replies: 3
Views: 59

units

When using DeBroglie's equation do you have to calculate given values into certain units before putting them into the equation?
by sarahartzell1k
Thu Oct 18, 2018 4:55 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: orbitals
Replies: 2
Views: 47

orbitals

How do you find the number of orbitals in a sub shell when given the value of l?
by sarahartzell1k
Fri Oct 12, 2018 7:24 am
Forum: SI Units, Unit Conversions
Topic: Units
Replies: 8
Views: 116

Re: Units

I am not sure about points but it is a good idea to write the units in your work just in case and so you know what the correct units should be at the end for your answer
by sarahartzell1k
Fri Oct 12, 2018 7:22 am
Forum: Significant Figures
Topic: sig figs urgent question!
Replies: 12
Views: 271

Re: sig figs urgent question!

There are 4 significant figures because the zeros are in between 1s which are sig figs.
by sarahartzell1k
Fri Oct 12, 2018 7:21 am
Forum: Limiting Reactant Calculations
Topic: Limiting Reagent
Replies: 10
Views: 204

Re: Limiting Reagent

personally, I would use the amount of each reagant to calculate the amount of moles you have then use the molar ratio to determine how many moles of each substance you need to find the limiting reactant that way.
by sarahartzell1k
Thu Oct 04, 2018 5:29 pm
Forum: Molarity, Solutions, Dilutions
Topic: aqueous solutions
Replies: 1
Views: 47

aqueous solutions

How do we explain how to prepare an aqueous solution when given the amount we need to prepare and a percent composition of a compound (such as in question G.7 in the sixth edition)?
by sarahartzell1k
Thu Oct 04, 2018 5:25 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular Formula
Replies: 12
Views: 92

Molecular Formula

How do you write the molecular formula for a compound when given the diagram of the molecular structure? (such as in question F.1 in the sixth edition for example)
by sarahartzell1k
Thu Oct 04, 2018 5:04 pm
Forum: Empirical & Molecular Formulas
Topic: Homework Problem F.3 (part a)
Replies: 2
Views: 46

Re: Homework Problem F.3 (part a)

There are some common rules you can memorize to help you find the formulas for acids and other compounds. For example, if an acid ends in "ic," it comes from an anion that ended in "ate," in this case nitrate (NO3-). Since the anion has a 1- charge, one hydrogen is needed to bala...

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