Answer:
83.000
Step-by-step explanation:
8.3 × 10⁴
= 8.3 × (10 × 10 × 10 × 10)
= 8.3 × (100 × 10 × 10)
= 8.3 × (100 × 100)
= 8.3 × 10.000
= 83.000
Conclusion:
The result of 8.3 × 10⁴ is 83.000
Answer: B ≈ to the left of
Answer : The value of for the final reaction is, 184.09
Explanation :
The equilibrium reactions in aqueous solution are :
(1)
(2)
The final equilibrium reaction is :
Now we have to calculate the value of for the final reaction.
Now equation 1 is multiply by 2 and reverse the equation 2, we get the value of final equilibrium reaction and the expression of final equilibrium constant is:
Now put all the given values in this expression, we get :
Therefore, the value of for the final reaction is, 184.09
Density can be calculated using the following rule:
density = mass / volume
Therefore,
volume = mass / density
For diamond:
we have mass = 0.5 grams and density = 3.51 g / cm^3
Substituting in the rule, we can calculate the volume of diamond as follows:
volume = 0.5 / 3.51 = 0.14245 cm^3
For graphite:
we have mass = 0.5 grams and density = 2.25 g / cm^3
Substituting in the rule, we can calculate the volume of graphite as follows:
volume = 0.5 / 2.25 = 0.2223 cm^3
Answer : -69.286 KJ heat energy is liberated.
Solution : Given,
Standard enthalpy of formation : When one mole of a substance is formed from its constituent elements.
(for 1 mole)
Mass of Mn = 7.9 g
Molar mass of Mn = 54.93 g/mole
First we have to calculate the moles of Mn.
The formation reaction of is represented as,
For this reaction, the standard enthalpy of formation is,
From the reaction, we conclude that
4 moles of Mn releases heat energy = -1924.6 KJ
0.144 moles of Mn releases heat energy =
Therefore, -69.286 KJ heat energy is liberated.