When 0.40 moles of SO2 and 0.60 moles of O2 are placed in an evacuated 1.00-liter flask, the reaction represented above occurs After the reactants and the product reach equilibrium and the initial temperature is restored, the flask is found to contain 0.30 moles of SO3. Based on these results, the value for the equilibrium constant, Kg of the reaction is... ○ 6.67 O 1.25 ○ 0.9375 02 ○ 4.62 0

Kc of the reaction is 0.9375

Explanation:

Step 1: Data given

Moles of SO2 = 0.40 moles

Moles of O2 = 0.60 moles

Volume = 1.00 L

After the reactio we find 0.30 moles SO3

Step 2: The balanced equation

2 SO2(g) + O2(g)  ⇔ 2SO3(g)

Step 3: Calculate Kc

Kc = [SO3]² / ([SO2]²[O2])

Kc = 0.30² / (0.40²*0.60)

Kc = 0.9375

Kc of the reaction is 0.9375

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.