5.9 g
11.8 g
23.8 g
47.3 g
Correct answer is B
No explanation has been provided for this answer.
What is the value of n in the following equation? Cr2O72- + 14H+ + ne- → 2Cr 3+ + 7H2O
2
3
6
7
Correct answer is C
No explanation has been provided for this answer.
backward reaction would be favoured
forward reaction would favoured
reaction would stop
reaction would be at equilibrium
Correct answer is B
No explanation has been provided for this answer.
1.0 mol dm-3
2.0 mol dm-3
4.0 moldm-3
5.0 moldm-3
Correct answer is B
50.5g 0f salt X is contained in 250cm3,
what mass of X is contained in 1000cm3
= (50.5 x 1000) ÷ 250 = 202g
no of moles of salt x = mass÷ molar mass
= 202÷ 101 = 2.0mol/dm3
Which of the following metallic oxides is amphoteric?
AI2O3
Fe2O3
MgO
Na2O
Correct answer is A
No explanation has been provided for this answer.