Search found 26 matches

by 705022748
Tue Dec 04, 2018 2:56 am
Forum: Coordinate Covalent Bonds
Topic: Difference between coordinate covalent and covalent bond
Replies: 3
Views: 234

Re: Difference between coordinate covalent and covalent bond

Coordinate covalent bonds have one species donate both electrons to the forming the bond while usually covalent bonds have one electron come from each atom.
by 705022748
Tue Dec 04, 2018 1:12 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg and Wavelength
Replies: 11
Views: 426

Re: Heisenberg and Wavelength

momentum and wavelength directly affect each other.
by 705022748
Mon Dec 03, 2018 11:39 pm
Forum: Quantum Numbers and The H-Atom
Topic: Drawing orbitals
Replies: 4
Views: 246

Re: Drawing orbitals

Draw the shape of the p orbital first and then draw it on the x axis and y axis and the z axis.
by 705022748
Mon Nov 26, 2018 1:08 am
Forum: Lewis Acids & Bases
Topic: Determine Lewis Acid
Replies: 13
Views: 537

Re: Determine Lewis Acid

Lewis acids become negatively charged and accepts electrons.
by 705022748
Mon Nov 26, 2018 1:03 am
Forum: Lewis Structures
Topic: Expanded Octet
Replies: 8
Views: 153

Re: Expanded Octet

Expanded octet is when an element can have more than 8 electrons, such as elements in the d-orbital.
by 705022748
Mon Nov 26, 2018 12:46 am
Forum: General Rate Laws
Topic: Unique Reaction Rates [ENDORSED]
Replies: 27
Views: 46652

Re: Unique Reaction Rates [ENDORSED]

The unique rate stays constant for all reactants and depends on coefficients of the reaction.
by 705022748
Fri Nov 16, 2018 1:26 am
Forum: Octet Exceptions
Topic: Octet vs formal charge
Replies: 16
Views: 455

Re: Octet vs formal charge

The accuracy of formal charge should be prioritized over having a full octet, because formal charge is usually more guaranteed while octet rule comes with exceptions.
by 705022748
Fri Nov 16, 2018 1:14 am
Forum: Electronegativity
Topic: Electronegativity
Replies: 8
Views: 234

Re: Electronegativity

Noble gases have stable configurations, so they don't have electronegativity values.
by 705022748
Thu Nov 15, 2018 11:47 pm
Forum: Ionic & Covalent Bonds
Topic: delta positive delta negative
Replies: 15
Views: 340

Re: delta positive delta negative

Delta negative means the atom accepts electrons and delta positive means the atoms donates electrons.
by 705022748
Thu Nov 15, 2018 11:41 pm
Forum: Empirical & Molecular Formulas
Topic: Going from empirical to Molecular formula
Replies: 14
Views: 563

Re: Going from empirical to Molecular formula

The number should be a whole number, but if it isn't and it's really close you can round it up.
by 705022748
Thu Nov 15, 2018 11:31 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 6
Views: 252

Re: Atomic Radius

Atomic radius increases down a group because additional shells create a greater distance from the nucleus and decreases across a period as the effective nuclear charges increases.
by 705022748
Thu Nov 15, 2018 11:12 pm
Forum: Quantum Numbers and The H-Atom
Topic: degeneracy of the a 4p orbital
Replies: 9
Views: 385

Re: degeneracy of the a 4p orbital

The answer would be 3 because p has one subshell, which will have 3 orbitals which all share the same energy level.
by 705022748
Thu Nov 15, 2018 11:05 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: diatomic elements
Replies: 12
Views: 622

Re: diatomic elements

Elements are diatomic because their valence shells aren't completely filled by electrons; therefore, electrons are shared a lower energy state is achieved.
by 705022748
Thu Nov 15, 2018 10:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Double/Triple Bonds
Replies: 5
Views: 122

Re: Double/Triple Bonds

Double and triple bonds don't affect bond angles, but the lone pairs do.
by 705022748
Thu Nov 15, 2018 10:50 pm
Forum: Octet Exceptions
Topic: Radicals
Replies: 16
Views: 421

Re: Radicals

Aim to get formal charge close to 0 and base the placement of your radical on that.
by 705022748
Thu Nov 15, 2018 10:37 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Determining the polarizability
Replies: 4
Views: 118

Re: Determining the polarizability

You don't have to look at the charge when looking at anions, only consider it when when ions have positive charge.
by 705022748
Thu Nov 15, 2018 10:31 pm
Forum: Photoelectric Effect
Topic: Work Function
Replies: 14
Views: 501

Re: Work Function

Use Ek=hv-work to solve for work functions and use other variables given in the problem to plug in!
by 705022748
Thu Nov 15, 2018 10:23 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: MOLARITY
Replies: 13
Views: 490

Re: MOLARITY

Molarity is the measure of concentration of a substance in a solution and is used to calculate concentrations, volumes, or moles of a solution, using M(initial)xV(initial) = M(final)xV(final)
by 705022748
Thu Nov 15, 2018 9:32 pm
Forum: Molarity, Solutions, Dilutions
Topic: Finding the volume of stock solution to dilute
Replies: 12
Views: 413

Re: Finding the volume of stock solution to dilute

L or mL is fine, just make sure to have matching units all throughout. It wouldn't hurt to change it at the beginning, since molarity is moles/L.
by 705022748
Thu Nov 15, 2018 9:13 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 917241

Re: Post All Chemistry Jokes Here

H2O is water and H2O2 is hydrogen peroxide. What is H2O4?
Drinking.
by 705022748
Thu Nov 15, 2018 9:10 pm
Forum: Properties of Electrons
Topic: Polar vs Non polar
Replies: 11
Views: 407

Re: Polar vs Non polar

To determine whether or not a molecule is polar or nonpolar, you have to consider the electronegativity between atoms, and if the atoms are symmetrical, it would most likely be nonpolar.
by 705022748
Thu Nov 15, 2018 10:54 am
Forum: General Rate Laws
Topic: Unique Reaction Rates [ENDORSED]
Replies: 27
Views: 46652

Re: Unique Reaction Rates [ENDORSED]

Unique rate depends on the stoichiometric coefficient, but stays the same for all products and reactants in the reaction.
by 705022748
Wed Nov 14, 2018 2:26 am
Forum: Limiting Reactant Calculations
Topic: Actual Yield
Replies: 7
Views: 371

Re: Actual Yield

Actual yield is usually given in the problem, but it can be calculated from an experiment.
by 705022748
Wed Nov 14, 2018 2:00 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Net Number Of Moles
Replies: 5
Views: 1734

Re: Net Number Of Moles

Taking the number of moles you get after a reaction and subtracting the number of moles from before the combustion should give you the net number of moles.
by 705022748
Wed Nov 14, 2018 1:39 am
Forum: SI Units, Unit Conversions
Topic: Molar Mass to Kg
Replies: 6
Views: 274

Re: Molar Mass to Kg

You'd divide by 6.0221 x 10^23 (Avogadro's Number), and then to convert from grams to kilograms by multiplying 10^3.
by 705022748
Tue Nov 13, 2018 11:41 pm
Forum: Significant Figures
Topic: When to round the answers to significant figures
Replies: 11
Views: 438

Re: When to round the answers to significant figures

Keeping as many significant figures when calculating gets you closest to the correct answer! You can round to the appropriate amount of significant figures at the end.

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