CHEMISTRY COMMUNITY

Cristian Carrasco 1F

Can someone explain this equation and what is it used to find ?

Cristian Carrasco 1F

How does a catalyst affect the reaction rate ?

Cristian Carrasco 1F

How do you draw mechanisms from rate laws?

Cristian Carrasco 1F

How does temperature affect the rate constant?

Cristian Carrasco 1F

How do you determine the reaction rate law from a mechanism?

Cristian Carrasco 1F

When finding the elementary reaction rate, do we use the coefficients of the reactants?

Cristian Carrasco 1F

How to do you derive the half reaction equation from the integrated ordered reaction?

Cristian Carrasco 1F

How do you integrate a rate law to find out the reaction order?

Cristian Carrasco 1F

What are the units for zero, first and second order reaction rates?

Cristian Carrasco 1F

In hw problem 15.5, for part a why is .44 moles x L -1 multiplied by 1/3 instead of 3 for the reaction rate of oxygen ?

Cristian Carrasco 1F

how do you calculate the half life of a second order reaction ?

Cristian Carrasco 1F

when solving reaction rate, do we use grams or moles?

Cristian Carrasco 1F

How do you find the rate of formation of given the concentrations?

Cristian Carrasco 1F

for N2+3H2----> 2NH3, would the rate of consumption of N2 to H2 be 1/3?

Cristian Carrasco 1F

How are the cell diagrams layed out can someone explain ? What goes on the left of the salt bridge and what goes on the right and the metal?

Cristian Carrasco 1F

in the half reaction Br- -----> BrO3- why is the charge on Br on the right side 5+?

Cristian Carrasco 1F

when doing the half reaction for Mno4- ----> Mn2+ why do we add 5e- to the left side??

Cristian Carrasco 1F

for problem 2 on the midterm, how would you find the delta H fusion of the ice cream?

Cristian Carrasco 1F

When calculating the entropy change in pressure, which R do you use for the formula: nRlnP1/P2?

Cristian Carrasco 1F

How do you calculate the entropy change of an isothermal expansion, like problem 9.9??

Cristian Carrasco 1F

question: A human body generates heat at the rate of about 100W. (1W 1J s-1) a. what rate does your body heat generate entropy in your surroundings, taken to be at 20 C b. how much entropy each day? c. would entropy be greater or less if in a room kept at 30 C? What equation do you use to solve this ?

Cristian Carrasco 1F

For irreversible expansion, why is w=P x delta V used instead of w= -nRt lnV2/V1?

Cristian Carrasco 1F

If a system is expanding would that be the system doing work? and would Delta U be positive or negative

Cristian Carrasco 1F

What formula is used to calculate delta H fusion of water?

Cristian Carrasco 1F

when calculating heat released in a reactions and using q= MC x delta T, do we use moles or grams for M?

Cristian Carrasco 1F

How do you set up the equation for the heat of a calorimeter like problem 8.21?

Cristian Carrasco 1F

when is W positive and when is it negative??

Cristian Carrasco 1F

Can someone explain what a thermochemical equation is ?

Cristian Carrasco 1F

How do you know if an element is in its standard state ?

Cristian Carrasco 1F

Which one has greater enthalpy, NO or NO2 and Why?

Cristian Carrasco 1F

Can someone explain what paramagnetic vs diamagnetic is and if its going to be on the final?

Cristian Carrasco 1F

How to figure out what atom has the greatest first ionization energy??

Cristian Carrasco 1F

Which element has the highest electron affinity??

Cristian Carrasco 1F

I would say just write it in alphabetical order since they will give you the name of the compound in alphabetical order.

Cristian Carrasco 1F

How would we calculate [H+} if were given the pH??

Cristian Carrasco 1F

Do lone pairs affect polarization?

Cristian Carrasco 1F

Can someone explain how to determine whether a coordinated compound is mono,bi,tri dentate???

Cristian Carrasco 1F

How do you know whether an oxide is an acid, base or amphoteric??

Cristian Carrasco 1F

I know the formula to solve this but I'm confused on how to solve it ?

Find the uncertainty in the position of a marble of mass 1.5 g given that it’s speed is
known to within ± 0.55 m.s-1.

Cristian Carrasco 1F

Can someone please explain how to solve this question?? Dr. Discovery has recently found an Alien civilization. It seems that the aliens are using an experimental setup similar to the photoelectric experiment (effect) to provide energy for their everyday life. Fortunately, in class we discussed the ...

Cristian Carrasco 1F

How do you know whether an oxide is acidic, basic or amphoteric??

Cristian Carrasco 1F

Can someone explain what the proton transfer equilibria is and how do you find it?

Cristian Carrasco 1F

How do you find the conjugate acid and base? For example, whats the conjugate acid of CH3NH2?

Cristian Carrasco 1F

Can someone tell me whats the importance of sigma and pi bonds and how we determine how many of each do we have?

Cristian Carrasco 1F

can someone explain why cobalt has an oxidation number of three in this coordination compound??

Cristian Carrasco 1F

Can someone please explain the importance of hybridization??

Cristian Carrasco 1F

I'm confused on the polarity of CCl2, can someone explain what it is and why ??

Cristian Carrasco 1F

I'm confused with resonance structure can someone please explain what it is ????

Cristian Carrasco 1F

Can someone please explain why beryllium does not follow the octet rule in some cases like BeCl2???

Cristian Carrasco 1F

Can someone help me in this problem???

1.48 What is the highest-energy photon that can be absorbed by a ground-state hydrogen atom without causing ionization? (b) What is the wavelength of this radiation? (c) To what region of the electromagnetic spectrum does this photon belong?

Cristian Carrasco 1F

Can someone please explain the difference between diffraction and destructive interference?? And why they are important wave properties of electrons???

Cristian Carrasco 1F

I would say 6.626 x 10^-34 would be best because its precise but Lavelle said they will be given to us on tests.

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