Answer:
0.082L or 82mL
Explanation:
Given parameters:
Pressure of gas = 780mmHg;
760mmHg = 1atm
780mmHg = 
= 1.03atm
Volume of gas = 80ml = 0.08L
Standard pressure = 1atm
Unknown:
Volume of gas = ?
Solution:
To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of gas is inversely proportional to the pressure if the temperature is constant".
Mathematically;
P₁ V₁ = P₂ V₂
P and V are temperature values
1 and 2 are initial and final states;
Insert the parameters and solve;
1.03 x 0.08 = 1 x V₂
V₂ = 0.082L or 82mL
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Answer:
N2+O2→2NO
Explanation:
Dalton’s atomic theory is based on law of constant composition and law of conservation of mass.
One of the postulates of this theory is that rearrangement of atoms occurs during a chemical reaction. In other words, only rearrangement of elements occurs during a chemical reaction and elements remain the same.
So, among the given, the following reaction undergoes rearrangement of elements.
N2+O2→2NO
SO, only the above reaction is possible as per Dalton’s atomic theory.
Answer: Physical change
Explanation: Condensation is the phase change of a gas to the liquid state. There is no formation of new products so it does not undergoes chemical change. Any phase change is considered a physical change.
Answer: Option (5) is the correct answer.
Explanation:
It is known that more is the number of carbon atoms linearly present in a compound more will be its boiling point. This is because then more number of intermolecular forces are present within the atoms of a compound.
Hence, lesser is the number of carbon atoms present less will be the intermolecular forces present in it. Therefore, more readily the compound will evaporate into the atmosphere.
Thus, we can conclude that given compounds are ranked in increasing rate of evaporation as follows.
< CH_{3}CH_{2}OH[/tex] < 
