Thursday
December 5, 2013

Posts by Rachelle

Total # Posts: 51

i solved for lnx=4,852,725 whats next? and i relaly cant put it into the calc. it says (overflow)

hi, i think this prob has to do what you did the last time but how does pressure play appart in this chapter?? What pressure would have to be applied to steam at 325°C to condense the steam to liquid water (ÄH vap = 40.7 kJ/mol)?

Chemistry
wow, thank you. when do you use the equation -qhot=qcold? I dont really understand fully q3 and q4 for q3 why do u have to use 24g ice but u use the Cp of water and not ice. and for q4 and we used another water equation... why do we have to do this twice? thanks so much!

Chemistry
A 24.0 g sample of ice at -19.0°C is mixed with 118.0 g of water at 85.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g°C, respectively, and the enthalpy of...

Algebra
Hi! Does anyone know a simple way to program the quadratic formula into a TI-83 (Texas Instruments?) I googled it, but most of the results required downloading (I don't have a connecting cable), or a bunch of keys that I couldn't find on my computer. Let me know if any...

Algebra
I meant what would "b" be then? Whoops

Algebra
What would be be then?

Algebra
What do you do when you have a quadratic equation such as x^2=2x-5, and there is no c value? Should you leave c as zero? one? Or just omit c entirely?

Algebra
I used an online math site, to explain quadratic equations. But the thing is, they said that (-4)^2 is 16, but my calculator said -16. Why is that? And also, how does the square root of 40 break down into the square root of 4 and the square root of ten? Does this have to do wi...

Algebra II
I am expected to use the quadratic equation for the following: x2 + 3x – 4 = (x + 4)(x – 1) = 0. Once this is plugged into the value of x (the long equation, which I am unable to copy from the internet, but it goes -3 plus or minus the square root of...) I got -8/2,...

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | Next>>

Search
Members