Physical Chemistry Answers

With a fact that at STP a mole of a gas occupies 22.4 L, calculate the entropy change
of mixing of 2.8 litres of O2 with 19.6 litres of H2 at STP. Assume the gases to behave
ideally

Hi, I have a chemistry assignment, where I am testing the rate of electrolysis with copper(anode) and steel(cathode) electrodes, and my research question is: "How does varying the concentration of the electrolyte (CuSO4) affect the mass of copper deposited at the anode from the cathode, within a 10 minute period, at a constant 10V?"
So I tested 5 different concentrations (0.1 M, 0.2 M, 0.5 M, 1.0 M, 1.5 M) and the results I got for the first 4 concentrations seemed to increase in a somewhat linear trend (as expected). But for the 1.5M test, my results were lower than the results I got for 1.0 M test. I asked my teacher about it, but all she could tell me is 'do more research'. I've tried, but I haven't found anything that explains why this is so. Personally, I think it's an anomaly, but I'm not sure, no one in my class did this experiment, so I can't compare my data.

list three ions that form compounds that are always soluble in water

Assuming that a gas X is an ideal gas. If 22.4g of X occupies 11.2dm at stp
a)How many moles of X are in the system?
b) what is the molecular weight of X
c)how many molecules of X are in the system?
d)What will be the volume occupied by the gas if it's heated to a temp of 273°c and the pressure is simultaneously reduced to half of the original value

Find the number of molecules of 3.01x1023 mole of HCI.

0.25 mol of an ideal monoatomic gas undergoes isothermal expansion from a volume of 2.0 dm3 to 10 dm3 at 27 oC. Calculate the maximum work that can be obtained from this process

derive integrated rate law for the first order reaction.

derive integrated rate law for the first order reaction.

Draw and explain the steps involved in carnot cycle.

State bragg law.list the assumption made by bragg in deriving bragg equation.