Recent content by whatlifeforme

Homework Statement Write the charge balance for a solution containing H(+), OH(-), Ca^(2+). HCO3(-). CO3^(2-) , Ca(HCO3)+, Ca(OH)+, K+, and CIO4(-).Homework Equations Also, I am having a trouble understanding the concepts of mass balance and charge balance. The Attempt at a Solution The...

Homework Statement Calculate the pH of 5.0 x 10^-8 M HCLO4. What fraction of the total H+ in this solution is derived from dissociation of water? Homework Equations The Attempt at a Solution The only thing I know to do is take -log(5.0 x 10^-8) .

Is what really necessary? 1.If I do a Bachelors of Arts in Chemistry I can take physics 2 algebra and get the credit i need, but i hate to take it without calculus, but i will if i have to.2. Bachelors of Science Chemstry Any / Biochemistry Concentration: requires calc physics 1 and 2.

I took algebra based physics 1, and need physics 2 to graduate. I don't want to take algebra based. Is it possible to take calc based physics 2 with taking algebra based physics 1? If i talked to my school what would they say? What if I needed calc physics 1 and 2 for BS would they sub 1?

I was contemplating majoring in chemistry when I go back to university. I don't want to do this physics (not that i don't like physics nor is it that i can't - just not interested in taking the classes). Thus, I would do a Bachelors of Arts instead of science to avoid the physics. I was...

tiny-tim: so differentiate each term, then go back and take the integral of each? where does that get me?

yes, when our teach show used she used integrals in part of the problem, but I've forgotten now.

we skipped taylor and mclaurin series as we did not have time.

Homework Statement Prove. Homework Equations arctan(x) = x - \displaystyle \frac{x^3}{3} + \frac{x^5}{5} - \frac{x^7}{7} + \frac{x^9}{9} for -1 < x < 1. The Attempt at a Solution \displaystyle \sum^{∞}_{n=1} \frac{x^{n+2}}{n+2}

Homework Statement Find the limit.Homework Equations lim(x->0+) \displaystyle \frac{\sqrt{x}}{\sqrt{sinx}}The Attempt at a Solution How should I approach this? I tried taking l'hospital's rule a few times but did not get anywhere.

Homework Statement Find polar coordinates. Homework Equations Cartesian: (-3,4) The Attempt at a Solution r = sqrt(9+16) = 5 sinθ = 4/5 cosθ = -3/5 θ = ∏ - arctan(4/3) Answer: (5, ∏ - arctan(4/3)) I do not understand why we have subtracted the value arctan(4/3) from pi?

yes. thanks.

so the proof using sin(A-B) would be: sin(∏-θ) = sin(∏) cos(θ) - cos(∏)sin(θ) = sin(θ) 0 - (-1)(sinθ) = sin(θ) --> sinθ=sinθ

i realize sin(θ) = sin(∏- θ) for values on in the interval 0<θ<pi by looking at the unit circle.

it must equal 8 + 7sin(θ) but I'm not sure how. are you using a trig identity?