Hank

This page lists questions and answers that were posted by visitors named Hank.

Questions

The following questions were asked by visitors named Hank.

A gas station manager thinks the average motorist changes their oil less than the recommended two times per year. In a survey 15 car owners were asked how many times they changed their oil in the past year. Here are the results: 1 1 2 1 2 2 0 1 0 1 2 3 1...

a hydrated salt is a solid that includes water molecules within its crystal structure. a student heated a 9.10-gram sample of a hydrated salt to a constant mass of 5.41 grams. what percent by mass of water did the salt contain?

When the area in square units of an expanding circle is increasing twice as fast as its radius in linear units, the radius is (a) 1/4pi (b) 1/4 (c) 1/pi (d) 1 (e) pi

Find the derivative of y = 3x+2/x+1

a)Find dy/x where y=tan(4=x^3)^4? B) Find relative extrema of f(x)=x^3-3x^2+4

Given y=(x^2+2)sqrt(x^3-8x) Find dy/dx

Find relative extrema of f(x)=x^3-3x^2+4

factor 5m^2-m-20

The scale factor for two similar retangles is 3. If the area of the smaller rectangle is 8m^2, what is the area of the larger rectangle.

Find all the solutions from [0, 2pi] cot^2x+csc=x

Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)--> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr but for...

If I had a question about complex ions and the problem had a "mixture" of two compounds, how would I know if one of the products formed is going to be a solid or liquid? I know there are solubility rules, but is there something else you can use to tell?

Calculate Ecell for reaction for the given info below.. O2(g)+2H2O(l)+4Ag(s)--> 4OH-(aq)+4Ag+(aq Ag+(aq)+ 1e ---> Ag(s) Ered= 0.80v O2(g)+2H2O(l) + 4e ---> 4OH- Ered= 0.40v My confusion is I have done problems similar to this when the Ered was negatives,...

Can someone show how to solve this problem Two vertical towers of heights 60 ft and 80 ft stand on level ground, with their bases 100 ft apart. A cable that is stretched from the top of one pole to some point on the ground between the poles, and then to t...

The distance between 2 towns is 330km. A train travels between these two towns and returns on the same day. On the return journey, the train left late and so the driver decided to drive the train 5km/h fasterthan its inward journey, and it took 30 minutes...

If the Fe2+(aq) + 2e---> Fe(s) was used as a reference for the electrode potential table instead of the standard hydrogen half cell what would the potential of the following half cell be? Ni2+(aq) + 2e---> Ni(s) A) -0.19 V B) -0.71 V C) +0.19 V D) +0.71 V

Which direct variation equation can be used to find n? Responses A y = 3xy = 3x B y = 12xy = 12x C y = 4xy = 4x D y = 2x

Answers

The following answers were posted by visitors named Hank.

is the answer 40.5% or 59.5% ?

well i got 3.69% but that doesnt look right

9.10-5.41=3.69 18.0152/3.69=??

Does it mean, 0.5*10*70=350 m?

So since Delta S= +79.0J/K is Delta S equal to Delta Ssys? I don't get the relationship of Delta S and sys and surr with delta S (entropy) that would make it become +79.0J/K DSsys and then DSurrs= (-21600J/mol*1mol)/298K= -72.5J/K Suniv= +79.0J/K+-72.5J/K...

Equilibria* (complex ions Equilibria)

If I was taking an exam and I had no solubility rules given...

I.e Pb(NO3)2+NaI==> PbI2 + NaNO3 I know NO3 will dissolve in water, but if I didn't know if PbI2 was solid or aqueous, how would i figure that out? and Al(3+)+ 6F- ===> [AlF6]^3- (aq)

I did as you said and I got the wrong answer. the correct asnwer is supposed to be +6.5, and I am getting -25.8.. Can you just show me how to do it with numbers and steps. I am just more confused now.

Could I just use the formula DSuniv= DSsys- (DHsys/T)

79.0J/K- 21600/298k= +6.5

Soil, air, light

Couldn't have said it better myself

Thanks Reiny, appreciate it

Why is ms. sue being hated on...HATE ON ZE REC BOTS!!!!!!...And go away tiky,

The answers from realms_end are sweet, but the hate is sour, realms is correct!

Tanks, Tiky now can get 100 on his homework. well now i can sit back relax and not get yelled by tiky

Tiky thought it was 130...But he did it anyways.

Wrong, its A,B,A,B

Yeah its 5%, can i borrow a cookie for Tiky?

Bruh....This is a type your own answer question...If i see one bit of plagiarizing...I swear...YOUR GONNA BE GONE

Ooook....ᴵᵗ ʷᵃˢ ᵗʰᵉ ᴮⁱᵍ ᴮᵃⁿᵍ ᵗʰᵉᵒʳʸ, AHEM...You heard nothing

Can we all be scared that Ms. Sue said No by itself....

If i have to get Tiky to tell you to do your own answer...

1: organizational strategies 2: to explain a concept 3: introduction 4:multimedia 5:classification Bam

Ya he is right...But i was the first to find out tho

arcos(cos 2pi/3) + arcos(cos 5pi/3) = pi or 180 degrees or 3.14159

I disagree, it should be π and I can say that will 100% certainty. arccos(cos (2π/3)) + arccos(cos (5π/3)) = π arccos is the cos-1() button on your calculator so change your calc to rads and type that in, you will get π

Man bro, i thought Nevada was insane, this is a whole new level.

What. I dont see answers. Uh oh i should get the metal doors ready

For 4 question people. ONLY 4 QUESTION PEOPLE! 1.cornstarch 2.The indicator will change the color of the substance. 3.it will bubble and foam 4.The test was inconclusive because the student forgot to add heat.

Hmm sus..Oh its right!