CHEMISTRY COMMUNITY

duenezjuleny1D

how can you determine if something has a higher or lower boiling point than the other?

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how exactly do you determine if a molecule has resonance?

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what does it mean for something to be radical and how does it become radical?

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How do you determine the difference between sigma and pi bonds?

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when naming how do you begin/what goes first and how do you know?

duenezjuleny1D

How do you identify whether or not something is polar or non polar? what does it depend on?

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What is the difference between a vsepr formula and Lewis structures? What exactly is a vsepr formula supposed to look

duenezjuleny1D

in the rydberg equation En= (-hR)/(n^2) why is there a negative included?

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how is it that decreasing the uncertainty in momentum affects the uncertainty in wavelength? can someone explain how wavelength is affected?

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how does an atom or molecule not follow the octet rules? how do you explain them?

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When making a Lewis structure for an ion, does it matter what atom the formal charge is on, or the structure is valid as long as the overall formal charge is correct?

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Usually in grams since most of the problems give to us will be in grams. But I also depends on if you’re converting/how you will convert.

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0 Kelvin is at absolute zero. Because you can't have negative kinetic energy, you can't go past zero.When at absolute zero, the particles stop moving.

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Yes in combustion reactions there will always be oxygen and a hydrocarbon as reactants and will always produce CO2 and H2O. Sometimes they can add nitrogen, N, but I believe you would be told to depending on the problem.

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No he stated in lecture that anything like that would be provided in the question/problem assigned.

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When balancing an equation in lecture prof Lavelle multiplied the entire equation by 2 in order to get the lowest whole number. Will points be deducted on the test if we don’t do so ?

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They will usually be “--> CO2 + H2O” but in reality it can change or form other compounds.

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We want to make sure not break the law of conservation of mass. It is important to balance on each side, the products and the reactants.

duenezjuleny1D

what does it mean for something to be radical and how does it become radical?

duenezjuleny1D

how do you determine the polarity of a central atom?

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when determining the coordination compound do we only count the number of bonds on to the central metal? or do we count the outer bonds as well?

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What does it mean for Ligands to be cisplatin?

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when identifying ligands are there any exceptions in which a molecule will and can only be monodentate or bidentate etc.?

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what is the affect that salt and water can have on acids?

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why is water always a lewis base and are there any other exceptions in which something is always a lewis base?

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how are you able to determine weak acids and bases? what makes them weak or strong?

duenezjuleny1D

how exactly do you determine if a molecule has resonance?

duenezjuleny1D

how many pi or sigma bonds would there be in a triple bond?

duenezjuleny1D

how can you determine if something has a higher or lower boiling point than the other?

duenezjuleny1D

you would have to double it therefore it would be 0.8m/s

duenezjuleny1D

for heisenberg principal is the greater then or equal to sign used as the equal sign?

duenezjuleny1D

how is it that decreasing the uncertainty in momentum affects the uncertainty in wavelength? can someone explain how wavelength is affected?

duenezjuleny1D

in the rydberg equation En= (-hR)/(n^2) why is there a negative included?

duenezjuleny1D

how does an atom or molecule not follow the octet rules? how do you explain them?

duenezjuleny1D

how do you find the work function only haven been given the frequency?

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how can we determine which reactant is the limiting reagent/determine percent yield?

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while identifying the molecular geometry of a molecule how do you identify if it is non-polar or polar?

duenezjuleny1D

when naming how do you begin/what goes first and how do you know?

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it is easy to remember if you know/understand the relationships between ionization energy, electronegativity, and electron affinity. if the electronegativity difference between two atoms is greater than 2, then the bond is an ionic bond. if the electronegativity difference between two atoms is less ...

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it is because of the lone pair electrons they will repel each other and change the angels

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if the shapes are identical then there should be no difference in the angles :)

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Sigma bonds are consisted of two orbitals each with one electron, overlap end-to-end with each other. They also allow bound atoms to freely rotate. Pi bonds consist of two orbitals, each with one electron, overlap side-by-side with each other. Pi bonds do not allow bound atoms to rotate. It also mat...

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yes, you will not be expected to know the exact values as lone pairs do change the angle value but it is sufficient to say so or just state if it would for example be less than 180 or less than 109.5

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London forces (known as Vander Waals) are weaker forms of dipole dipole forces. They are usually forces with unequal amounts of electrons shared between two atoms. While London forces occur when a positively charged nucleus of an atom attracts the electron cloud of another atom.

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How is it that some shapes can have lone pairs and others must have lone pairs? For example in problem 4.1 (6th edition) there are ball-and-stick models of two molecules, it asks to indicate whether there MUST be, MAY be, or CANNOT be one or more lone pairs of electrons on the central atom. How exac...

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The VSEPR Theory is basically a prediction of the molecular structure/geometry of a model based off of the number of electron lone pairs and attached atoms of molecules it is more 3D while Lewis structures are 2D.

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Ideally, you would like all of your ions to have a formal charge/overall charge of 0 but you will always be looking for the most stable structure possible!

duenezjuleny1D

How do you identify whether or not something is polar or non polar? what does it depend on?

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