Homework Statement
A known mass of methylamine, CH3NH2, was dissolved in water at 25 celsius
50.0 cm^3 of this solution was taken and titrated with 1.00x10^-1 mol dm^-3 hydrochloric acid solution, HCL(aq). The change in pH as an increasing volume of hydrochloric acid was added is shown in the...
Homework Statement
A strong base cane be assumed to be fully ionised in dilute solution. Use the Kw value to calculate the hydrogen ion concentration and hence the pH of a 0.15 M solution of potassium hydroxide, KOH.Homework Equations
The Attempt at a Solution
Problem is, I don't know where to...
Homework Statement
Pluto is 40 times further from the Sun than we are. How long is a year on Pluto? (Use Kepler's third law.)
Homework Equations
4∏^2/Gm=T^2/r^3
The Attempt at a Solution
Te^2(Earth period)=x*r^3
Tp^2(Pluto period)=x*(40r)^3
I don't know what to do...
A 40μF capacitor and 20μF are in parallel. With 12V.
Calculate total capacitance and V on each capacitor
Q=CV E=1/2CV^2 Ct=C1+C2
I don't know where to go from here, calculating total capacitance is easy enough. Don't know how to to calculate V on each capacitor however.
Any help would be...
0.36=(K)x(Q1xQ2/0.25^2)
Find Q1 and Q2 if Q1=3(Q2)
Using the solve function in my calculator I get Q1=2.74x10^-6 and Q2=9.13x10^-7
I would just like to know whether my answer is correct and how to do it in a calculator without using the solve function.
Thanks in advance.
Edit: Yep sorry...