The approximate volume of air containing 10cm3 of oxygen is?
20 cm3
25 cm3
50 cm3
100 cm3
Correct answer is C
Volume of air containing 10 cm O2 is
(100 x 10)/(20) = 50cm3
The equilibrium is driven to the left
The equilibrium is driven to the right
There is no effect
More ZnO is produced
Correct answer is C
No explanation has been provided for this answer.
-51.O KJ mol-
+57.3 KJ mol-
+57.O KJ mol-
+51.0 KJ mol-
Correct answer is A
NH4OH = 20cm of 0.1 m
NH4 + HCl → NH4Cl = H2O
Heat of Neutralization of NH4OH
= \(\frac{-102}{2}\) = -51.0 KJ mole-1
Which of these represents a redox reaction?
AgNO3 + NaCl → AgCAl + NaNO3
H2S + Pb(NO3) → PbS + 2HNO3
CaCO3 → CaO + CO2
Zn + 2HCl → ZnCl2 + H2
Correct answer is D
No explanation has been provided for this answer.
3.90 x 102 coulombs
5.50 x 103 coulombs
6.54 x 103 coulombs
2.34 x 104 coulombs
Correct answer is D
No explanation has been provided for this answer.