P1 MISTAKES

Question 1

which of the following observations provides evidence that matter is composed of atoms?
A. line emission spectra of hydrogen produces 4 visible lines
B. NaCl is soluble in water and conducts electricity in aq state
C. water is liquid at RTP, but hydrogen sulfide and hydrogen slenide are gases
D. 12g of carbon combines with either 16 or 32 g of oxygen but never any other ratio

Answer 1

D

Question 2

which aqueous solutions would have a different wavelength of max absorbance from 0.10 mol/dm3 FeSO4?
1. 0.01 mol/dm3 FeSO4
2. 0.10 mol/dm3 Fe2(SO4)3
3. 0.10 mol/dm3 FeSCN2+

Answer 2

2 and 3

they arent FeSO4???

Question 3

which substance exhibits only London forces between molecules?
A. PF5
B. SF4
C. SO2
4. XeO2

Answer 3

A

Question 4

which of these have positive enthalphy changes?
1. atomisation
2. ionisation
3. hydration

Answer 4

1 and 2

Question 5

slow step requires the ____ potential energy

Answer 5

MOST

Question 6

which factor is dependent on temperature?
a. activation energy
b. pre-exponential factor
c. rate constant
d. gas constant

Answer 6

C

Question 7

in a equaiton where the forward reaction forms gas, in order to get more of the product, ________ the volume of the reaction vessel

Answer 7

increase

Question 8

when you have the system 2A <==> B + 3C at equilibrium, whats the equilibrium constant?

Answer 8

[B][C]^3
/
[A]^2