Search found 38 matches

by Melissa_Aguirre1J
Thu Jun 07, 2018 2:32 pm
Forum: General Science Questions
Topic: Final [ENDORSED]
Replies: 10
Views: 513

Re: Final [ENDORSED]

Should we focus on the new material or the old material more? Which one will be more heavily concentrated on the exam?
by Melissa_Aguirre1J
Thu Jun 07, 2018 2:32 pm
Forum: General Science Questions
Topic: Final [ENDORSED]
Replies: 10
Views: 513

Final [ENDORSED]

Up until what day will the final cover?
by Melissa_Aguirre1J
Thu Jun 07, 2018 9:51 am
Forum: Amphoteric Compounds
Topic: Amphoteric Compiund
Replies: 2
Views: 227

Amphoteric Compiund

What is an amphoteric compound?
by Melissa_Aguirre1J
Thu Jun 07, 2018 9:47 am
Forum: Lewis Acids & Bases
Topic: Ionic Equations and net ionic equation
Replies: 3
Views: 119

Re: Ionic Equations and net ionic equation

What is the difference between an ionic equation and a net ionic equation?
by Melissa_Aguirre1J
Thu May 31, 2018 12:45 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Double bond
Replies: 3
Views: 109

Double bond

Why wouldn't one pi bond be considered a double bond?
by Melissa_Aguirre1J
Thu May 31, 2018 12:42 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR and Polarity
Replies: 1
Views: 131

VSEPR and Polarity

What is the relationship between VSEPR and polarity?
by Melissa_Aguirre1J
Thu May 31, 2018 12:35 am
Forum: Sigma & Pi Bonds
Topic: Relationship between Sigma and Pi bondss
Replies: 2
Views: 230

Relationship between Sigma and Pi bondss

Why can't there be two sigma bonds and a pi bond in a triple bond?
by Melissa_Aguirre1J
Thu May 31, 2018 12:31 am
Forum: Determining Molecular Shape (VSEPR)
Topic: lone pairs
Replies: 5
Views: 185

Re: lone pairs

How does the addition of lone pairs affect the bond angle? I know that lone pairs are not included in the VSEPR model, but would the lone pairs affect the VESPR model in any way?
by Melissa_Aguirre1J
Thu May 24, 2018 9:08 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizing Power
Replies: 3
Views: 205

Polarizing Power

How do you determine what atom has higher polarizing power? Do we need to know that?
by Melissa_Aguirre1J
Thu May 24, 2018 9:07 am
Forum: Bond Lengths & Energies
Topic: Dissociation Energy
Replies: 3
Views: 196

Dissociation Energy

How do you measure dissociation energy? Do we need to know that?
by Melissa_Aguirre1J
Thu May 24, 2018 9:06 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarity
Replies: 2
Views: 191

Polarity

How can you tell if something is polarizable?
by Melissa_Aguirre1J
Thu May 24, 2018 9:04 am
Forum: Ionic & Covalent Bonds
Topic: Ionic and Covalent Bonds
Replies: 2
Views: 186

Ionic and Covalent Bonds

So an ionic bond is an equal sharing of electrons that do not have a charge and covalent bonds have partial charges?
by Melissa_Aguirre1J
Thu May 17, 2018 9:37 am
Forum: Lewis Structures
Topic: Creating a Lewis Stucture
Replies: 8
Views: 251

Re: Creating a Lewis Stucture

Another example would be CH3CH2OH
by Melissa_Aguirre1J
Thu May 17, 2018 9:35 am
Forum: Lewis Structures
Topic: Creating a Lewis Stucture
Replies: 8
Views: 251

Re: Creating a Lewis Stucture

An example of this would be H2C(NH2)COOH
by Melissa_Aguirre1J
Thu May 17, 2018 9:35 am
Forum: Lewis Structures
Topic: Creating a Lewis Stucture
Replies: 8
Views: 251

Creating a Lewis Stucture

I know that the element with the lowest ionization energy goes in the middle, but, when you have a lot of elements, how do you determine which ones go on the side of it and on top of it?
by Melissa_Aguirre1J
Thu May 17, 2018 9:32 am
Forum: Electronegativity
Topic: Relationship between Electronegativity and Ionization Energy
Replies: 4
Views: 816

Relationship between Electronegativity and Ionization Energy

I know that the element with the lowest ionization energy goes in the middle of the Lewis structure. Would that element also have the highest electronegativity, or would it be the lowest? What is their relationship?
by Melissa_Aguirre1J
Thu May 10, 2018 10:07 am
Forum: Trends in The Periodic Table
Topic: Relationship between Ionic Radius, Atomic RdiuIonization Enrgy, Electron Affinity
Replies: 3
Views: 255

Relationship between Ionic Radius, Atomic RdiuIonization Enrgy, Electron Affinity

What is the relationship between atomic radius, ionic radius, ionization energy, and electron affinity? Are atomic and ionic radius related and going in the same direction and ionization energy and electron affinity related and going in the same direction?
by Melissa_Aguirre1J
Thu May 10, 2018 10:04 am
Forum: Trends in The Periodic Table
Topic: Atomic Radius and Ionic Radius
Replies: 2
Views: 159

Atomic Radius and Ionic Radius

Are atomic radius and ionic radius the same thing? If not, why not? Is so, why?
by Melissa_Aguirre1J
Thu May 10, 2018 10:00 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Relationship between Electromagnetic Radiation and Enrgy of the photon
Replies: 2
Views: 152

Relationship between Electromagnetic Radiation and Enrgy of the photon

How is electromagnetic radiation related to energy of the photon? Are they the same thing?
by Melissa_Aguirre1J
Thu May 10, 2018 9:58 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: energy emitted
Replies: 2
Views: 157

energy emitted

What is the difference between the equations v=R((1/(n1^2))-(1/(n2^2))) and -hR/n^2? What are the similarities? What is their overall relationship?
by Melissa_Aguirre1J
Sun May 06, 2018 12:13 am
Forum: Limiting Reactant Calculations
Topic: M9
Replies: 1
Views: 183

M9

M.9 Copper(II) nitrate reacts with sodium hydroxide to produce a precipitate of light blue copper(II) hydroxide. (a) Write the net ionic equation for the reaction. (b) Calculate the maximum mass of copper(II) hydroxide that can be formed when 2.00 g of sodium hydroxide is added to 80.0 mL of 0.500 m...
by Melissa_Aguirre1J
Sat May 05, 2018 11:59 pm
Forum: Photoelectric Effect
Topic: 1.34
Replies: 2
Views: 183

1.34

1.34 The work function for chromium metal is 4.37 eV. What wavelength of radiation must be used to eject electrons with a velocity of 1.5  103 kms1?
by Melissa_Aguirre1J
Sat May 05, 2018 11:58 pm
Forum: Photoelectric Effect
Topic: 1.69
Replies: 2
Views: 155

1.69

1.69 In a recent suspense fi lm, two secret agents must penetrate a criminal’s stronghold monitored by a lithium photomultiplier cell that is continually bathed in light from a laser. If the beam of light is broken, an alarm sounds. The agents want to use a handheld laser to illuminate the cell whil...
by Melissa_Aguirre1J
Sat May 05, 2018 11:50 pm
Forum: Molarity, Solutions, Dilutions
Topic: G5
Replies: 2
Views: 219

G5

G5.A student prepared a solution of sodium carbonate by adding 2.111 g of the solid to a 250.0-mL volumetric fl ask and adding water to the mark. Some of this solution was transferred to a buret. What volume of solution should the student transfer into a fl ask to obtain (a) 2.15 mmol Na; (b) 4.98 ...
by Melissa_Aguirre1J
Fri Apr 27, 2018 11:38 pm
Forum: Photoelectric Effect
Topic: Longest and Highest Wavelength of Radiation that is able to eject an electron [ENDORSED]
Replies: 2
Views: 126

Longest and Highest Wavelength of Radiation that is able to eject an electron [ENDORSED]

How do you calculate the longest and shortest wavelengths that are able to eject an electron?
by Melissa_Aguirre1J
Fri Apr 27, 2018 11:16 pm
Forum: Properties of Electrons
Topic: Ground State
Replies: 5
Views: 297

Re: Changing Ground State to Excited State

How do we calculate the change from ground state to excited state and excited state to ground state?
by Melissa_Aguirre1J
Fri Apr 27, 2018 11:15 pm
Forum: Properties of Electrons
Topic: Ground State
Replies: 5
Views: 297

Re: Ground State

How are we supposed to determine the ground state of an electron?
by Melissa_Aguirre1J
Sun Apr 22, 2018 12:05 am
Forum: Properties of Light
Topic: units for frequency and wavelength [ENDORSED]
Replies: 9
Views: 261

Re: units for frequency and wavelength [ENDORSED]

Frequency is measured in Hertz or 1/sec (The units for Frequency is Hertz). The units for wavelength are meters.
by Melissa_Aguirre1J
Sat Apr 21, 2018 11:50 pm
Forum: Photoelectric Effect
Topic: Threshold Energy [ENDORSED]
Replies: 4
Views: 138

Re: Threshold Energy [ENDORSED]

How is the work function related to the threshold energy?
by Melissa_Aguirre1J
Sat Apr 21, 2018 11:50 pm
Forum: Photoelectric Effect
Topic: Threshold Energy [ENDORSED]
Replies: 4
Views: 138

Threshold Energy [ENDORSED]

What would be considered the threshold energy?
by Melissa_Aguirre1J
Sun Apr 15, 2018 10:17 am
Forum: Ionic & Covalent Bonds
Topic: Types of Bonds
Replies: 10
Views: 377

Re: Types of Bonds

Covalent bonds are pairs of shared electrons between atoms. This type of bonding occurs between two atoms of the same element or of elements close to each other in the periodic table. Thus, in order to determine this, you would have to look at the periodic table.
by Melissa_Aguirre1J
Sun Apr 15, 2018 10:11 am
Forum: Limiting Reactant Calculations
Topic: Finding Excess Amount of Reactant [ENDORSED]
Replies: 2
Views: 127

Finding Excess Amount of Reactant [ENDORSED]

How do you find the excess amount of the reactant that is not the limiting reactant in a limiting reactant problem?
by Melissa_Aguirre1J
Sun Apr 15, 2018 10:09 am
Forum: Molarity, Solutions, Dilutions
Topic: Relationship between Molarity and Concentration?
Replies: 3
Views: 270

Relationship between Molarity and Concentration?

What is the relationship between Molarity and Concentration? In a question where they ask us to find the concentration, can we use the m1v1=m2v2 formula?
by Melissa_Aguirre1J
Sun Apr 15, 2018 10:06 am
Forum: Significant Figures
Topic: Significant Figures When Multiplying and Dividing [ENDORSED]
Replies: 4
Views: 220

Significant Figures When Multiplying and Dividing [ENDORSED]

What is the difference between the amount of significant figures needed when multiplying and the amount of significant figures needed when dividing?
by Melissa_Aguirre1J
Sun Apr 15, 2018 10:04 am
Forum: Limiting Reactant Calculations
Topic: actual vs. theoretical yield [ENDORSED]
Replies: 6
Views: 377

Re: actual vs. theoretical yield [ENDORSED]

The actual yield is the amount of the product that has actually been produced, which is usually less than the theoretical yield. The theoretical yield is the amount of the product that could be formed, once all of the limiting reactant has been completely consumed.
by Melissa_Aguirre1J
Sun Apr 15, 2018 9:59 am
Forum: Molarity, Solutions, Dilutions
Topic: Molar Mass and Atomic Mass
Replies: 3
Views: 240

Re: Molar Mass and Atomic Mass

The molar mass is the atomic mass expressed in grams.

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