Which chemical equation represents the reaction of an Arrhenius acid and an Arrhenius base?
2 answers:
Answer : The correct option is, (1)
Explanation :
According to the Arrhenius acid-base concept,
Arrhenius acid is a species that produces ion in an aqueous solution and Arrhenius base is a species that produces
ion in an aqueous solution.
From the given options, option 1 chemical equation represents the reaction of an Arrhenius acid and an Arrhenius base. In this reaction, produces
ion in an aqueous solution and act as an Arrhenius acid,
produces
ion in an aqueous solution and act as an Arrhenius base.
While the other options does not represents the reaction of an Arrhenius acid and an Arrhenius base.
Reaction 2 is an example of combustion reaction.
Reaction 3 is an example of single-displacement reaction.
Reaction 4 is an example of double-displacement reaction.
Hence, the correct option is, (1)
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Answer: The volume of 0.640 grams of gas at Standard Temperature and Pressure (STP) is 0.449 L.
Explanation:
Given: Mass of gas = 0.640 g
Pressure = 1.0 atm
Temperature = 273 K
As number of moles is the mass of substance divided by its molar mass.
So, moles of (molar mass = 32.0 g/mol) is as follows.
Now, ideal gas equation is used to calculate the volume as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
Thus, we can conclude that the volume of 0.640 grams of gas at Standard Temperature and Pressure (STP) is 0.449 L.