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...
15 years ago
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?
14 years ago
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
13 years ago
Find the derivative of y = 3x+2/x+1
13 years ago
a)Find dy/x where y=tan(4=x^3)^4? B) Find relative extrema of f(x)=x^3-3x^2+4
13 years ago
Given y=(x^2+2)sqrt(x^3-8x) Find dy/dx
13 years ago
Find relative extrema of f(x)=x^3-3x^2+4
13 years ago
factor 5m^2-m-20
13 years ago
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.
13 years ago
Find all the solutions from [0, 2pi] cot^2x+csc=x
11 years ago
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...
10 years ago
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?
10 years ago
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,...
10 years ago
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...
10 years ago
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...
8 years ago
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
3 years ago
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
2 years ago

Answers

The following answers were posted by visitors named Hank.

is the answer 40.5% or 59.5% ?
14 years ago
well i got 3.69% but that doesnt look right
14 years ago
9.10-5.41=3.69 18.0152/3.69=??
14 years ago
Does it mean, 0.5*10*70=350 m?
14 years ago
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...
10 years ago
DrBob222
10 years ago
Equilibria* (complex ions Equilibria)
10 years ago
If I was taking an exam and I had no solubility rules given...
10 years ago
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)
10 years ago
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.
10 years ago
Could I just use the formula DSuniv= DSsys- (DHsys/T)
10 years ago
79.0J/K- 21600/298k= +6.5
10 years ago
Cxf
10 years ago
nah
9 years ago
Soil, air, light
8 years ago
Couldn't have said it better myself
8 years ago
Thanks Reiny, appreciate it
8 years ago
Why is ms. sue being hated on...HATE ON ZE REC BOTS!!!!!!...And go away tiky,
4 years ago
The answers from realms_end are sweet, but the hate is sour, realms is correct!
4 years ago
Tanks, Tiky now can get 100 on his homework. well now i can sit back relax and not get yelled by tiky
4 years ago
Tiky thought it was 130...But he did it anyways.
4 years ago
Wrong, its A,B,A,B
4 years ago
Yeah its 5%, can i borrow a cookie for Tiky?
4 years ago
Bruh....This is a type your own answer question...If i see one bit of plagiarizing...I swear...YOUR GONNA BE GONE
4 years ago
Ooook....ᴵᵗ ʷᵃˢ ᵗʰᵉ ᴮⁱᵍ ᴮᵃⁿᵍ ᵗʰᵉᵒʳʸ, AHEM...You heard nothing
4 years ago
Can we all be scared that Ms. Sue said No by itself....
4 years ago
If i have to get Tiky to tell you to do your own answer...
4 years ago
1: organizational strategies 2: to explain a concept 3: introduction 4:multimedia 5:classification Bam
4 years ago
Ya he is right...But i was the first to find out tho
4 years ago
arcos(cos 2pi/3) + arcos(cos 5pi/3) = pi or 180 degrees or 3.14159
3 years ago
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
3 years ago
Man bro, i thought Nevada was insane, this is a whole new level.
3 years ago
What. I dont see answers. Uh oh i should get the metal doors ready
3 years ago
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.
3 years ago
Hmm sus..Oh its right!
3 years ago
ty!
2 years ago