Imagine that A and B are cations and X, Y, and Z are anions, and that the following reactions occur: AX(aq)+BY(aq)→no precipitat
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Answer:
The value is
Explanation:
From the question we are told that
mass of carbon dioxide produced by one gallon of gasoline is
The number of cars is
The distance covered by each car is
The rate is
Generally the amount of gasoline used by one car is mathematically represented as
=>
=>
Generally the amount of gasoline used by N cars is
=>
=>
Generally the annual production of carbon dioxide is mathematically represented as
=>
=>
Answer : The freezing point of a solution is
Explanation : Given,
Molal-freezing-point-depression constant =
Mass of urea (solute) = 29.82 g
Mass of solvent = 500 g = 0.500 kg
Molar mass of urea = 60.06 g/mole
Formula used :
where,
= change in freezing point
= freezing point of solution = ?
= freezing point of solvent =
i = Van't Hoff factor = 1 (for urea non-electrolyte)
= freezing point constant =
m = molality
Now put all the given values in this formula, we get
Therefore, the freezing point of a solution is