Recent content by policy

Calcium hydroxide solution absorbs carbon dioxide gas (to form a precipitate of calcium carbonate). What volume of a 1.35mol/L solution is needed to dissolve 25mL of carbon dioxide at 25°C and 100 kPa? Thanks!

13.0mL of ethanol was dissolved in water and the solution made to 100mL. The density of ethanol is 0.79 g/mL Calculate the concentration of the solution in: a) g/100mL of solution b) g/L c) %(w/v) Thanks!

The net force is shown along with all but one of the contributing forces. Determine the magnitude and direction of the missing force in a) and b) Thanks

1) Prove, for all positive integers n , the identity \frac{1}{n+1}+ \frac{1}{n+2} +... +\frac{1}{2n} =1- \frac{1}{2}+ \frac{1}{3}-...+ \frac{1}{2n-1} - \frac{1}{2n}. 2) The sequence x_{n} is given by x_{1} = 1 and x_{n+1} = \frac{4+ x_{n} }{1+ x_{n} } for n \geq 1. a) Prove...

The roots of the equation t²-2t+2=0 are a and b. Prove that [(x+a)ⁿ-(x+b)ⁿ]/(a-b) = (sin nθ)/(sinⁿ θ), where cot θ = x +1 Any help would be appreciated!