The given units are the units of masses which are interconvertable.
It is given that:
Now, converting :
Since,
So,
Now converting :
Since, 1 kg = 1000 g
So,
For :
Thus, of ointment needed to be prepared by the pharmacist.
What volume of concentrated hydrochloric acid (12.0 M HCl) is required to make 2.0 liters of a 3.0 M HCl solution?
2 answers:
<u>Answer:</u> The volume of concentrated HCl solution is 0.5 L
<u>Explanation:</u>
To calculate the volume of the concentrated HCl solution, we use the equation:
where,
= molarity and volume of the concentrated HCl solution
= Molarity and volume of the diluted HCl solution
We are given:
Putting values in above equation:
Hence, the volume of concentrated HCl solution is 0.5 L
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This means to raise the temperature of 1 g of water by 1 degree Celsius we need 4.18 joule of energy.
Now, look at the question. We are asked that how much amount of energy would be required to raise the temperature of 25 g of water by (54-50) = 4 degree celsius.
To do so we have formula
Q = m C (temperature difference)
Have a look at pic for answer