20. A compound's empirical formula is C. H.O. If the molecular mass of the compound is 162.2g, what is the molecular formula?
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Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.