0.10 mol of solid sodium hydrogen carbonate and 0.20 mol of solid sodium carbonate are
dissolved in the same beaker of water, transferred to a volumetric flask and made to
250.0 mL. The Ka for HCO3– is 4.7 x 10^–11.
What is the pH of the resulting buffer?
I have a question here, we know that
Velocity = dS/dT, where S = distance and T = time
Acceleration = dV/dT, where V= Velocity and T=time
But since velocity = S/T and acceleration =V/T, why can't we substitute acceleration = (S/T)/T = S/T^2?
Can anyone explain how differential works in the physics formulas, like one topic on Hydrostatics, it is said that dF = rho*g*y dy. While i know that F = pressure * area, why can't we use the F = P*A formula?2 JawabanMathematics10 tahun yang lalu
The rate constants for the decomposition of N2O5 were measured to be 4.3 x 10^-5 at a temperature of 27°C and 6.97 x 10^2 at a temperature of 227°C. The activation energy in kJ/mol for this reaction is :
b. 104 kJ/mol
d.180 kJ/mol2 JawabanChemistry1 dekade yang lalu
The intermediate formed from attack of an electrophile on benzene in electrophilic aromatic substitution is called..?
1) a resonance stabilised carbocation
2) a nucleophile
3) negatively charged
5) a carbocation which isnt stabilised by resonance
Which one is correct?1 JawabanChemistry1 dekade yang lalu