Wednesday

October 14, 2015
Total # Posts: 127

**Chemistry**

The standard solution of FeSCN2 (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.550. If a trial's absorbance is measured to be 0.350 and its initial concentration of SCN– was 0.0010 M, the equilibrium concentration...
*August 8, 2008*

**Chemistry**

The solubility of borax is directly proportional to temperature. Therefore, the sign of H is A. negative B. positive
*August 8, 2008*

**chemistry**

lol webwork.
*August 8, 2008*

**Chemistry**

Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. dependent on the mass of solute present. C. independent of the chemical ...
*August 8, 2008*

**Chemistry**

The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 99.0 g of water to give a final volume 101 mL are ______Molarity and _______molality. How do I do this?
*August 4, 2008*

**Chemistry- HWK CHECK**

1. A solution in which no more solid can be dissoved is referred to as ____. Answer: saturated 2.At constant pressure, heat can be referred to as (entropy, enthalpy, or free energy). Answer: enthalpy The measure of disorder or randomness of a system is(entropy, enthalpy, or ...
*August 4, 2008*

**Chemistry**

The freezing point of a solution is A. lower than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstructon by solute particles.. B. lower than the freezing point of the solvent alone ...
*August 4, 2008*

**math**

when I have (2x^(3)-18x)-(2x^(3)) / (x^(2)-9) am I suppose to be left with -18x/(x^(2)-9) or is it just 18x? Please help and thanks!
*July 29, 2008*

**math**

What are the critical values of f(x)=(x^(7))((x+7)^(2)) and f(x)=7x+6x^(–1)?
*July 23, 2008*

**math**

What are the critical numbers of f(t)=3t^(2/3)+t^(5/3)
*July 23, 2008*

**math**

I just meant radical for short f(x)=x(x^(2)+9)^(1/2)
*July 23, 2008*

**math**

what is the second derivative of f(x)=x *rad(x^(2)+9 )?
*July 23, 2008*

**Math - sign wrong**

The answer is still wrong :(
*July 19, 2008*

**Math**

The answers are wrong for this one.
*July 19, 2008*

**Math**

Use Newton's method to approximate a root of the equation 5sin(x)=x as follows. Let x1=2 be the initial approximation. The second approximation x2 is: and the third approximation x3 is:
*July 19, 2008*

**Math**

Use differential, i.e., linear approximation, to approximate (125.4^(1/3)) as follows: Let f(x)=x^(1/3) . The linear approximation to f(x) at x=125 can be written in the form y=mx+b where m is: m=1/75 b=? How do I find b?
*July 19, 2008*

**Math**

Consider the function f(x)=8(x^(1/2))+7 on the interval [1,5]. By the Mean Value Theorem, we know there exists a c in the open interval (1,5) such that f'(c) is equal to this mean slope. For this problem, there is only one c that works. Find it.
*July 19, 2008*

**Math**

f(x)=2x^(3)–1x^(2)+3x–2 Find the average slope of this function on the interval (1,7).
*July 18, 2008*

**calculus**

If 4x^(2)+5x+xy=4 and y(4)=-20, find y'(4) by implicit differentiation. I got y'=(-8x-5-y)/(x)
*July 12, 2008*

**math**

What is the time that they will meet on the 7th day?
*July 9, 2008*

**math**

Person 1 was walking down a path one day when Person2 appeared in front of it at exactly 8:06 AM. The next day, Person 1 was walking down the same path, and Person 2 appeared in front of it at 6:03 PM. The next day, the same thing happened at 11:05 AM. The next three days were...
*July 9, 2008*

**Chem!**

does the addition of a strong acid increase the percent ionization of a weak acid HB?
*April 16, 2008*

**Economics**

What economic policy should be adopted by regions with persistent economic problems? Why is macroeconomic policy NOT the solution?
*April 5, 2008*

**Chemistry**

The state of aggregation of solids can be described as belonging to the following four types: ionic, metallic, covalent network, and molecular. For each of these types of solids, indicate the kinds of particles that occupy the lattice points and identify forces among the ...
*January 29, 2008*

**anatomy**

How many bones in the human body have marrow??
*January 9, 2008*

**AP Chem**

i always get the error analysis section of my lab wrong so i need a NON human error in an experiment involving the diffusion of gases Experiment: stick cotton ends of a Q-tip (one soaked in HCl and one in NH3) into either end of a drinking straw and measure where precipitate is
*December 11, 2007*

**Womens History**

A woman's rights in reagrds to spousal abuse ____________. A. varied widely depending on the colony in which she found herself living B. varied widely depending on the colony in which she was married. C.were strictly defined by federal law. D.were strictly defined by the ...
*September 8, 2006*