alvi

Two drops of 0.20 M imidazole were added to a solution containing ferrihemoglobin. The

mass of the solution was measured before and after the addition of the imidazole and recorded to be 2.550 g and 2.632 g (meaning that .082 g of Imidazole were added)

Assuming that the densities of all solutions are identical, calculate the concentration of imidazole in the final solution after the 2 drops of imidazole solution were added.

So far I have calculated that about 0.001205 mol of imidazole were added, but I am not sure where to go from there. Also, when I assumed density is 1g/mL, my answer did not make sense. It may just have been my calculation but I am not sure.

A 26.60 g sample of water containing tritium, H-3, emits 1450 beta particles per second. Tritium is a weak beta emitter, with a half-life of 12.3 yr.

What fraction of all the hydrogen in the water sample is tritium? [ Hint: Use equations ln(Nt/No)= kt and k=.693/(half-life).]

ok this is really weird, but whenever i try to make a call on my phone, i cant hear anything. i cant hear it ringing, and when i call voicemail i cant hear that annoying woman ask me for my passcode. but if i put it on speakerphone i can hear it fine. i checked the earpiece volume, and it was up all the way, so thats not the issue. this has been happening for a few days now, so its not the signal i have either.

i dont want to be making calls via speakerphone, because thats obnoxious, so does anyone know what it could be?

a/(b+x)=b/(x-1)

i got to cross multiplying,

b(b+x)=a(x-1)

but i dont know how to solve for x from there.

thanks in advance!

i just have a couple of questions on how to start these problems..

solve for x in terms of a and b

(b-a)x=4x-(3/a)

same thing:

(4+x)/(3-x)=a/5b

and lastly,

it says find the slope of a line that makes an angle of 150 with the positive x-axis.

the graph that they provide would make a 30-60-90 triangle, so would the slope then be 1/(sqrt(3)) ??

thanks!!

ok, now i must have read this book a while ago...

its about some girl who visits her grandma in a nursing home. eventually a new guy (apparantly hes also v good looking) comes to her school and follows her. she runs to her grandmas nursing home and into the forest behind it. she is then transported into some weird land, and then back into her grandmas time. she then meets her grandma as a teenager.

idk i was just wondering if it was a very vivid dream of mine or a book. i am pretty sure its a book though

ok, im really stuck on these problem sets, and i figured out most of these problems most of the way, but i got lost, (lol)

i tried asking this before, but i didnt get an answer.

1. i got that 2x^3+9x^2-11x-30 but i think i need to factor more, andd when i tried to do so, i got (x^2-1)(2x+9)(11x+30) is that right?

2. if the circumfrence of a circle is cut in thirds, how will the area be changed?

3. well, ok so its a weird factor machine type question...

g(x)=1/(sqrt(x^2-9)) and h(x)=1/(x^2)

so what does h(g(x)) equal?

i got that it would be 1/(1/(x^2-9)), but that doesnt seem right...

sorry.. i am completely lost with that one...

4. x^8 - 256 factor... how could i? because if i do -2^8, it equals 256, not negative

just list your favorite places, please don't just give a website.

sorry, i feel like i am using this too much for help, but it is only the second question i am asking, and probably the last time.

A point (x,y) on a graph is determined by these 2 equations.

x= - 3 + 2t

y= 6 - t

where t (some strange e symbol) [ - 3 , 4 ]

make a table of integer values for t, x, y

graph ordered pairs (x,y) on coordinate axes (dont have to do that)

find restrictions on x (domain)

find restrictions on y (range)

what is the total distance traveled by teh point as t went from -2 to 5?

thanks so much.

x^2+4y^2=36

x^2=-y+3

find all possibilities of (x,y)