A battery transforms two types of energy, chemical energy to electrical energy.
Answer: Chemical and electrical energy
The correct answer would be A. Dark coloured soil.
The percent yield is 45 %.
CaCO₃ →CaO + CO₂
First, calculate the theoretical yield of CaO.
Theor. yield =
60 g CaCO
3
×
1 mol CaCO
3
100.0 g CaCO
3
×
1 mol CaO
1 mol CaCO
3
×
56.08 g CaO
1 mol CaO
=
33.6 g CaO
Now calculate the percent yield.
% yield =
actual yield
theoretical yield
×
100
%
=
15 g
33.6 g
×
100
%
=
45
Le Chatelier's principle states that when a change is brought to a system in equilibrium, the equilibrium will shift in a manner to reverse that change.
If the pressure is increased, the system will try to reduce the pressure. The only way it can do this is by producing less gas. Therefore, shifting the equilibrium to the left. Thus, the statement is true.