Answer:
You see things happen much sooner than you hear them.
Explanation:
Light travels about a million times as fast as sound.
When the ball hits the bat , it will take about a million times longer to hear the crack of the bat than to see it.
What you see is almost instantaneous.
There will be a delay until you hear the sound.
Answer:
The mole fraction of ethanol and water in the solution are 0.19 and 0.81 respectively.
Explanation:
The Molar Fraction is a way of measuring the concentration that expresses the proportion in which a substance is found with respect to the total moles of the solution, which are calculated by adding the moles of solute (s) and solvent.
It is calculated by dividing the number of moles of one of the components by the total number of moles of the solution.
The sum of all the molar fractions of the substances present in a solution is equal to 1.
So, the expression to calculate the mole fraction is:

Being the molar mass of the compounds:
- Ethanol 46
- Water 18

the number of moles that represent the mass quantities is calculated as:
- Moles of ethanol: 300 grams*
= 6.52 moles
- Moles of water: 500 grams*
= 27.78 moles
So the total moles in solution are 6.52 moles + 27.78 moles = 34.3 moles
The mole fraction of ethanol in the solution is calculated as:


The mole fraction of water in the solution is calculated as:


Then:


<u><em>The mole fraction of ethanol and water in the solution are 0.19 and 0.81 respectively.</em></u>
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The acid is harsh and causes pain so having less of it means that it is less aggressive
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Answer:
yes
Explanation:
the components of solutions fixed