Answer:
1) 17.5 mL
Explanation:
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In this case, the reaction between sulfuric acid and potassium hydroxide is:
In such a way, we notice a 1:2 molar ratio between the acid and the base, therefore, at the equivalence point we have:
And in terms of concentrations and volumes:
Thus, we solve for the volume of acid:
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Molality= moles NaCl/ Kg H2O
250 g (1 Kg/ 1000 grams)= 0.250 Kg
Molality= 0.611 moles/ 0.250 Kg= 2.44 molal
Answer:
C3H3O
Explanation:
Now, what we need to do is to divide the percentage compositions by the relative atomic masses.
The relative atomic mass of carbon 12, the relative atomic mass of hydrogen is 1 while the atomic mass of oxygen is 16.
We now do the divisions as follows:
Carbon = 63.15/12 = 5.2625
Oxygen = 31.55/16 = 1.971875
Hydrogen = 5.30/1 = 5.30
Now,we now divide by the smallest I.e that of oxygen.
Carbon = 5.2625/1.971875 = 2.668
Oxygen = 1.971875/1.971875 = 1
Hydrogen = 5.3/1.971875= 2.688
We can round up the ratio of carbon and hydrogen to 3.
Thus, the empirical formula is C3H3O
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