Search found 60 matches

by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 10:31 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: q=mCdeltaT
Replies: 11
Views: 785

Re: q=mCdeltaT

I assume if they give you grams you use m, if moles then youd use n.
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 10:31 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity of Water
Replies: 3
Views: 208

Re: Heat Capacity of Water

the unit change is all the same no matter whether in Celsius or Kelvin in this case
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 10:30 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Bomb calorimeter
Replies: 6
Views: 241

Re: Bomb calorimeter

regular calorimeter=reaction takes place in the water, bomb calorimeter=reaction takes place in a sealed metal container.
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 10:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Stability of reactants and products
Replies: 2
Views: 152

Re: Stability of reactants and products

you can determine it by the equilibrium constant k
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 10:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: using molarity vs moles
Replies: 2
Views: 172

Re: using molarity vs moles

excercises from where exactly?
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 10:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Midterm Questions
Replies: 2
Views: 163

Re: Midterm Questions

^ it implies it is at equilibrium so yes you are able to use the ICE table
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 9:57 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Partial Pressure
Replies: 4
Views: 185

Re: Partial Pressure

^ yes solids should not be included
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 9:24 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Shifting K with changes in volume
Replies: 4
Views: 229

Re: Shifting K with changes in volume

Yes it will shift to the sides with more moles due to more volume and less pressure
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 9:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test #1
Replies: 3
Views: 202

Re: Test #1

^yes those are the ones !
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 9:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Direction reaction goes
Replies: 2
Views: 192

Re: Direction reaction goes

Kc, you must convert moles of the reactants to pressure values using PV=nRT the ideal gas law
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 9:05 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ka Kb = Kw
Replies: 5
Views: 256

Re: Ka Kb = Kw

you can use it to find the pH or the pOh
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 9:05 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium constant
Replies: 5
Views: 74

Re: Equilibrium constant

catalyst ahs no effect on equilibrium
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:43 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Conjugate Base and Acid
Replies: 4
Views: 86

Re: Conjugate Base and Acid

^A conjugate acid is a base with a hydrogen ion added to it, a conjugate base is what is left over after an acid has donated a proton
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:42 pm
Forum: Phase Changes & Related Calculations
Topic: removing heat from system
Replies: 4
Views: 194

Re: removing heat from system

^ yes it does not necessarily change, however you"ll see whether enthalpy is positive or negative by knowing if the reaction is exothermic or endothermic
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:42 pm
Forum: Phase Changes & Related Calculations
Topic: removing heat from system
Replies: 4
Views: 194

Re: removing heat from system

^ yes it does not necessarily change, however you"ll see whether enthalpy is positive or negative by knowing if the reaction is exothermic or endothermic
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:35 pm
Forum: Phase Changes & Related Calculations
Topic: Isothermal
Replies: 9
Views: 292

Re: Isothermal

it usually will let you know , however you can also assume if it is at a constant T
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:32 pm
Forum: Calculating Work of Expansion
Topic: -DeltanRT
Replies: 2
Views: 208

Re: -DeltanRT

yes you can use it, but it is mostly used for specific chemical rxns
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:31 pm
Forum: Calculating Work of Expansion
Topic: Units for R
Replies: 10
Views: 330

Re: Units for R

depending which R you used is also dependent on the units you have, at the end most should be able to cancel all out
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:30 pm
Forum: Calculating Work of Expansion
Topic: Work without change in volume
Replies: 8
Views: 308

Re: Work without change in volume

since there is no delta v , your delta v would be 0 so your overall work would also be 0
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:30 pm
Forum: Calculating Work of Expansion
Topic: irreversible and reversible
Replies: 5
Views: 268

Re: irreversible and reversible

^ yes reversible reactions are generaly theorectical, majority will always be irreversible
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:28 pm
Forum: Calculating Work of Expansion
Topic: Equations for work
Replies: 7
Views: 263

Re: Equations for work

the first two are definitely the same equation
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 8:27 pm
Forum: Calculating Work of Expansion
Topic: Work
Replies: 1
Views: 174

Work

do we use w= -nRT only when a specific reaction occurs?
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 12:36 pm
Forum: General Rate Laws
Topic: Instantaneous Rate
Replies: 1
Views: 152

Instantaneous Rate

does the instantaneous rate changes as the reaction proceeds for most reactions?
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 12:30 pm
Forum: General Rate Laws
Topic: Unique Average Rate
Replies: 1
Views: 151

Unique Average Rate

the unique average rate is the average rate divided by the stoichiometric coefficient of the species monitored?
by Heidi Ibarra Castillo 1D
Sat Mar 16, 2019 12:29 pm
Forum: General Rate Laws
Topic: Average Rate of Reaction
Replies: 2
Views: 145

Average Rate of Reaction

The average rate of a reaction is the change in concentration of a species divided by the time over which the change takes place?
by Heidi Ibarra Castillo 1D
Fri Mar 15, 2019 11:14 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Cell Potential
Replies: 1
Views: 29

Standard Cell Potential

Is the standard cell potential always cathode - anode?
by Heidi Ibarra Castillo 1D
Fri Mar 15, 2019 11:01 pm
Forum: Zero Order Reactions
Topic: Zero-order reactions
Replies: 4
Views: 197

Re: Zero-order reactions

I believe the units for a zero order reaction is M/s
by Heidi Ibarra Castillo 1D
Fri Mar 15, 2019 9:46 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy
Replies: 2
Views: 159

Gibbs Free Energy

When delta G is equal to 0 it means it is at equilibrium?
by Heidi Ibarra Castillo 1D
Fri Mar 15, 2019 9:44 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy
Replies: 1
Views: 175

Gibbs Free Energy

when it is negative, it means it is sponatenous right?
by Heidi Ibarra Castillo 1D
Fri Mar 15, 2019 9:43 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isometric/Isochoric
Replies: 10
Views: 294

Isometric/Isochoric

Is a bomb calorimeter an example of isometric/osochoric?
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:55 pm
Forum: Naming
Topic: Oxidation Number
Replies: 2
Views: 187

Re: Oxidation Number

^yes, exactly you would need to see the overall charge of the coordination compound first then add the overall charges within the ligands in order to find the oxidation state of the metal. However, keep in consideration the cations or anions if there are any outside the coordination compound.
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:51 pm
Forum: Naming
Topic: Ligand Names
Replies: 4
Views: 282

Re: Ligand Names

i believe both are acceptable since it was barely changed
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:50 pm
Forum: Naming
Topic: bis-, tris-, etc.
Replies: 4
Views: 227

Re: bis-, tris-, etc.

oxalate would have to use these prefixes due to it being bidentate
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:48 pm
Forum: Naming
Topic: -ate in naming
Replies: 7
Views: 319

Re: -ate in naming

you only add when the complex ion is an anion
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:47 pm
Forum: Sigma & Pi Bonds
Topic: Rotation
Replies: 5
Views: 278

Re: Rotation

However, the pi form between the p-orbitals of two atoms and secure the top and bottom of an atom in place so there can be no rotation occurring
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:46 pm
Forum: Sigma & Pi Bonds
Topic: Rotation
Replies: 5
Views: 278

Re: Rotation

Sigma bonds bond end to end, allowing the rotation to occur
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:44 pm
Forum: Sigma & Pi Bonds
Topic: Test 3 Q3D
Replies: 4
Views: 253

Re: Test 3 Q3D

the two pi bonds should be drawn next to each other because they prevent rotation
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:43 pm
Forum: Sigma & Pi Bonds
Topic: Why are sigma bonds stronger than pi bonds?
Replies: 10
Views: 429

Re: Why are sigma bonds stronger than pi bonds?

The sigma bonds have a greater overlap
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:34 pm
Forum: Lewis Acids & Bases
Topic: Na+
Replies: 3
Views: 373

Na+

Why does Na+ not affect pH?
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:34 pm
Forum: Lewis Acids & Bases
Topic: Ions as Bases
Replies: 1
Views: 152

Ions as Bases

So a salt containing a base will raise solution pH?
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:32 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: H-atom
Replies: 1
Views: 247

H-atom

So if light is emitted, it means delta E will be negative right ?
by Heidi Ibarra Castillo 1D
Sun Dec 09, 2018 7:27 pm
Forum: Lewis Acids & Bases
Topic: Stronger Acid
Replies: 1
Views: 179

Stronger Acid

Why is HCl a stronger acid than HF?
by Heidi Ibarra Castillo 1D
Sun Nov 04, 2018 6:49 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin Magnetic Quantum Number
Replies: 6
Views: 410

Re: Spin Magnetic Quantum Number

well we know our ms will always be -1/2 or +1/2 because each orbital can only hold 2 electrons, however i don't think there's a way to identify whether its the - or + value
by Heidi Ibarra Castillo 1D
Sun Nov 04, 2018 6:47 pm
Forum: Octet Exceptions
Topic: What are the octet exceptions?
Replies: 9
Views: 226

Re: What are the octet exceptions?

^I believe it is because they don't obtain 8 electrons, so they don't need to have a full octet
by Heidi Ibarra Castillo 1D
Sun Nov 04, 2018 6:37 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 4
Views: 103

Re: Atomic Radius

so it is based off the attraction of the protons and electrons?
by Heidi Ibarra Castillo 1D
Sun Nov 04, 2018 6:01 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 8
Views: 168

Re: Formal Charge

thank you !
by Heidi Ibarra Castillo 1D
Thu Nov 01, 2018 6:48 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 8
Views: 168

Formal Charge

How do you determine your V, L , and S?
by Heidi Ibarra Castillo 1D
Thu Nov 01, 2018 6:39 pm
Forum: Resonance Structures
Topic: 7th Edition 2C5.C
Replies: 2
Views: 156

Re: 7th Edition 2C5.C

^yeah I believe changing around the area of double bond won't result in losing the electron.
by Heidi Ibarra Castillo 1D
Thu Nov 01, 2018 6:31 pm
Forum: Resonance Structures
Topic: Reasonance Structures
Replies: 1
Views: 86

Reasonance Structures

Why are the e- in resonance structures delocalized?
by Heidi Ibarra Castillo 1D
Sun Oct 21, 2018 5:42 pm
Forum: DeBroglie Equation
Topic: HW Problem 1.39 (6th Edition)
Replies: 4
Views: 147

HW Problem 1.39 (6th Edition)

Does anyone know how to solve this problem?
by Heidi Ibarra Castillo 1D
Sun Oct 21, 2018 5:29 pm
Forum: Einstein Equation
Topic: The symbol v?
Replies: 16
Views: 532

Re: The symbol v?

Yeah exactly, frequency is usually italicized with a curve to it where as velocity is just a regular lower case v. It might be confusing at first to depict it from the equations, but they do have different appearances.
by Heidi Ibarra Castillo 1D
Sun Oct 21, 2018 5:27 pm
Forum: Einstein Equation
Topic: HW Problem 1.25 (6th Edition)
Replies: 2
Views: 96

HW Problem 1.25 (6th Edition)

Does anyone know how to go on solving part b and c for this problem?
by Heidi Ibarra Castillo 1D
Tue Oct 16, 2018 5:50 pm
Forum: Ionic & Covalent Bonds
Topic: Electron Configuration of Cations
Replies: 8
Views: 193

Electron Configuration of Cations

Example: Write the electron configurations of a. copper (|) ion b. copper (||) ion
When finding the electron configuration how do you know how many electrons to remove?
by Heidi Ibarra Castillo 1D
Thu Oct 04, 2018 9:43 pm
Forum: Molarity, Solutions, Dilutions
Topic: Problem G15 (7TH EDITION) Part B
Replies: 3
Views: 46

Re: Problem G15 (7TH EDITION) Part B

So, since the concentration basically needs 1/5 of the starting NaOH solution , does it mean I would need to add four volumes of water to one volume of the 2.5 mol*L^-1 solution? I divided the 60 by 5 and got 12.0 mL. So I got that 12.0 mL of 2.5 mol*L^-1 of the solution is added to the 48.0 mL of w...
by Heidi Ibarra Castillo 1D
Thu Oct 04, 2018 9:10 pm
Forum: Balancing Chemical Reactions
Topic: Problem H1 (7th EDITION) Part A
Replies: 4
Views: 104

Problem H1 (7th EDITION) Part A

The question states: It appears that balancing the chemical equation Cu+SO2 -> CuO + S would be simple if we could just add another O atom to the product side. Why is that procedure not allowed? I stated you can't add the O atom because it is not produced by the defined reaction but I am unsure if t...
by Heidi Ibarra Castillo 1D
Thu Oct 04, 2018 12:45 pm
Forum: Molarity, Solutions, Dilutions
Topic: Problem G15 (7TH EDITION) Part B
Replies: 3
Views: 46

Problem G15 (7TH EDITION) Part B

How would I go upon answering the question?
Question: An experiment requires the use of 60.0 mL of 0.50 M NaOH(aq). The stock room assistant can only find a reagant bottle of 2.5 M NaOH(aq). How can the 0.50 M NaOH(aq) be prepared?

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