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CHEMISTRY
Aluminum hydroxide reacts with an excess of hydroxide ions to form the complex ion Al(OH)4 a)Write an equation for this reaction b) Calculate K. c) Determine the solubility of Al(OH)3 in (mol/L) at pH 12.0 My equation was Al(OH)3
asked by Jessica on April 11, 2007 
Further Maths
If f(y)=2y3+9y2+ayb where a and b are constant,find the values of the constant a and b hence (1) factorize f(y) completely (2) State the zeros of f(y) (3) find the remainder when f(y) is divided by (y5)
asked by Ande2 on September 29, 2018 
Physics
Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 1.75 s and the second in 1.17 s. Find the constant acceleration
asked by Erin on October 10, 2009 
chemistry
Use the appropriate values of Ksp and Kf to find the equilibrium constant for the following reaction: PbCl2(s)+ 3OH(aq) >> Pb(OH)3 (aq) + 2Cl(aq). ksp for PbCl2 is 1.17*10^5 kf for complex ion is 8*10^13. anyways...I know that
asked by anonymous on April 24, 2010 
math,help
I definately do not understand this problem. If y varies directly with x, and y = 600 when x = 1000, find the constant of variation K. If y is directonally (proportional) to x, then for every value of x there is a value for y
asked by jacky on March 31, 2007

AP CHEMISTRY
write the equilibriumconstant expression and calculate the value of the equilibrium constant for each of the following reactions at 298 K. (a) NaHCO3(s) NaOH(s) + CO2(g) Answer: Keq = PCO2 (b)Value of the Equilibrium Constant:
asked by DAN on March 19, 2012 
calculus
Consider the curves y = x^2and y = mx, where m is some positive constant. No matter what positive constant m is, the two curves enclose a region in the first quadrant.Without using a calculator, find the positive constant m such
asked by John on March 4, 2012 
Physics
A 100kg trolley is being pushed up a rough 30° incline by a constant force. The friction force between the incline and the trolley is 110N. (a) Determine thd value of the constant force that will move the trolley up the incline
asked by Slavh on September 7, 2014 
Calculus
1) Find correct to six decimal places root of the equation cos(x)= x for xE[0, pi/2] using Newton's Method. 2) A triangle has two constant lengths of 10 cm and 15 cm. The angle between two constant sides increases at a rate of 9
asked by G on May 4, 2013 
oscillation nad waves
find the equivalent spring constant for a system of two spring of constant k 1 and k2 connected in series .use your result to explain to explain what happens when a sprin g of constant k is cut into two equal halves
asked by deepak on April 27, 2011 
math
i kinda need help with these 2 please: assume (y) varies direcly as (x) if (x)=32 when (y)=6, what is the value of k? and (y) varies directly as (x) find the constant when (x)=0.5, and (y)=0.3 and can someone also explain what
asked by allysa on October 7, 2008