shift the equilibrium to the right
increase the yield of ammonia
decrease the amount of hydrogen
decrease the yield of ammonia
Correct answer is D
In this case, an increase in in temperature will cause the equilibrium position to shift to the left thereby decreasing the yield of ammonia.
Which of the following statements about an equilibrium system is correct?
Forward and backward reactions occur at the same rate
The concentrations of reactants must equal that of the products
The concentrations of, reactants and products can be changed by adding a catalyst,
The concentrations of reactants and products are not affected by a change in temperature
Correct answer is A
Equilibrium is a state of a system where there is no observable change in the properties of the system with respect to time
Which of the following gases is alkaline?
NO\(_{2}\)
CO\(_{2}\)
NH\(_{3}\)
N\(_{2}\)O
Correct answer is C
Alkaline gases are any gaseous compounds that form an alkali (or basic) solution with a pH greater than 7 when dissolved in water. Ammonia is the most common alkaline gas
Graphite is used as a dry lubricant due to the presence of
mobile electrons
free electrons
octahedral structures
layered structures
Correct answer is D
Graphite is an excellent dry lubricant. This is because its layered structure allows one layer to slide over another easily. It is non-volatile and not sticky.
1.0 atm
0.1 atm
9.0 atm
0.9 atm
Correct answer is B
Partial pressure is found by Dalton's Law:
Px = PTotal ( nx / nTotal )
where
Px = partial pressure of gas x
PTotal = total pressure of all gases
nx = number of moles of gas x
nTotal = number of moles of all gases
Step 1
Find PTotal
Standard pressure is 1 atm.
Step 2
Add up the number of moles of the component gases to find nTotal
nTotal = noxygen + nnitrogen
nTotal = 100 + 900
nTotal =1000cm3
Step 3
Now you have all the information needed to plug the values into the equation and solve for Poxygen
P-oxygen = PTotal ( n-oxygen / nTotal )
oxygen = 1 atm ( 100 / 1000 )
oxygen= 0.1atm