Answer:
- 50.7 kJ.
Explanation:
- To get the enthalpy change for the reaction:
Mn₃O₄(s) + CO(g) ⟶ 3MnO(s) + CO₂(g).
- We must orient the given reactions in a way that its sum give the required reaction.
The first reaction be as it is:
Mn₃O₄(s) + 4CO(g) ⟶ 3Mn(s) + 4CO₂(g), <em>ΔH₁ = 255.6 kJ.</em>
The second reaction should be reversed and multiplied by 3 and also the value of its ΔH must multiplied by (- 3):
3Mn(s) + 3CO₂(g) ⟶ 3MnO(s) + 3CO(g), <em>ΔH₂ = (- 3)(102.1 kJ) = - 306.3 kJ.</em>
- By summing the two reactions after the modification, we get the required reaction:
<em>Mn₃O₄(s) + CO(g) ⟶ 3MnO(s) + CO₂(g).</em>
<em></em>
<em>∴ ΔH rxn = ΔH₁ + ΔH₂ = (255.6 kJ) + (- 306.3 kJ) = - 50.7 kJ.</em>
Explanation:
Basically
The concentration of reactants and the products becomes equal at equilibrium. The equilibrium position is changed if the concentration of the species in the mixture is changed.
- the disturbance causes a change in Q; the reaction will shift to re-establish Q=K.
The volume of 0.240 m sulfuric acid necessary to react completely with 66.9 g sodium hydroxide is 6.<u>96 L</u>
Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.
Calculation:-
Concentration = 0.24 M
mass = 66.9 g
The molar mass of Sodium Hydroxide is = NaOH
= 40g
mole = mass/molar mass
= 66.9/40
= 1.67 mole
C = moles/volume
Volume = moles/ concentration
= 1.67/0.24
= 6.<u>96 L</u>
The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.
The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute.
Learn more about concentration here:-brainly.com/question/26255204
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Answer:
Probably A.
Explanation:
Its either A or C. A is more probable imo
Answer:
The volume of gas is 58.22 L which will occupy at 250.°C and 680 mm Hg pressure.
Explanation:
Given:
Temperature = 27°C
To make it into kelvin = 27+273
= 300K
Pressure =740mm Hg
to make it in atm. = 
= 0.973atm
n = 2.3 moles
Volume of gas =?
As we know according to the formula
PV = nRT
On substituting the values
= 
= 58.22 L
Therefore, 58.22L volume of gas will occupy at 250.°C and 680 mm Hg pressure.
