Austin C

N2(g) + O2(g) <--> 2 NO(g)

Products over reactants? Do I include solids or liquids?

Products over reactants? Do I include solids or liquids?

∫(x^2-1/3)sin(x^3+x)

U sub? U=x^3+x?

∫sqrt(x)lnx

By parts? U=lnx and dv=x^1/2 ?

∫(dx)/×sqrt(6-x^2)

I hope I wrote this clearly. Essentially inergate 1 over x times the square root of 6 minus x squared.

trig sub? Were x=(sqrt6)sinθ and dx=(sqrt6)cosθ? I come up with something weird I can't figure out. Did I sub wrong?

∫5sin^2(2x)

I think I use 1/2(1-cos2x) to sub for sin^2. Im thrown by the 5 in front and 2x though.

∫lnx/x^2

Do I start with by parts u= ln x and dv= x^-2??

Integrate:

∫ln(5x-2)

Explination as well pls

Integrate:

∫((lnx)^2)/2

Some explination not just an answer would be apreciated :)

Integrate:

∫((lnx)^2)/2

Some explination not just an answer would be apreciated :)

So I was given this parametric equation:

x=t^2-1

y=t^4-4t^2

V.T.

dx/dt= 2t

2t=0

t=0

So there is a vert. tan. at (-1, 0)

H.T.

dy/dt= 4t^3-8t

4t^3-8t=0

4t(t^2-2)=0

T=0,(+ or-)sqrt3

So I think made a mistake but cant figure out where. I have a vertical tangent and horizontal tangent at t=0

Y=x^3

y=1

X=0

Rotated about x axis

I have

π∫1^2-(x^3)^2 from 0 to 1. Is that right so far?

What if it is rotated about y=-1?

Thanks!

Integrate:

(1+e^-x)/(e^-x+x)

Looking for some explanation. Thanks!

I know the area of a circle is pi times the radius times radius. The problem im having is when to convert to feet. When I convert to feet before using the area formula I get a diffrent answer then when I convert after. Which one is correct? What am I missing here. Thanks.

A near sighted person has a far point that is 4.2 m from his eyes. What focal length lenses in diopters must he use in his contacts to allow him to focus on distant objects?

The focal length of an objective of a telescope is 0.2 m and the eye piece has a focal length of 1.6 m. What is the length of this telescope?

Havextree748 is my user name add your if you want others to add you or just add me lol

The mechnism for the aqueous reaction between hydrogen peroxide and iodide in a acid solution is giben as follows:

H^(+) + I^(-) --> HI (fast)

H2O2+ HI --> H2O2 +HOI (slow)

HOI+ H^(+) + I^(-) --> H2O + I2 (fast)

I ^(-) + I2 --> I3^(-)

A. What is the overall reaction?

B. Write the rate law for this reaction.

The rate of the reaction 2HgCl2+ C2O4^(-2)---> 2Cl^ (-) +2CO2+ Hg2Cl2 is followed by measuring the number of moles of Hg2Cl2 that precipitate per liter per min.

Exp HgCl2 C2O4 ^(-2) initial rate (mol/L-min)

1 0.104 0.15 1.8x10^-5

2 0.104 0.30 7.2x10^-5

3 0.052 0.30 3.6x10^-5

4 0.052 0.15 9.0x10^-6

A. Determine the overall rate of the reaction.

B. What is the value of the rate constant k?

C. What would the initial rate of reaction if [HgCl2]= 0.44 M and [C2O4^-2]= 0.024 M?

Regarding the first order reaction 2A--> 3B +C are the following true or false?

A. The rate of the reaction will tripple if the concentration of b is trippled?

B. The time required for one half the substance a to react is independent of the quantity of A.

C. A plot of 1/[A] vs time yeilds a straight line.

D. The rate of formation of C is one-third the rate of formation B.