28. A 20.0 g sample of sucrose contains 8.4 g of carbon. What is the mass percentage of carbon in sucrose?

10-14. (a) when 100.0 ml of weak acid ha were titrated with 0.093 81 m naoh, 27.63 ml were required to reach the equivalence point. find the molarity of ha. (b) what is the formal concentration of a- at the equivalence point? (c) the ph at the equivalence point was 10.99. find pk. for ha. (d) what was the ph when only 19.47 ml of naoh had been added?

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Identify and describe the three ways that mutations affect organisms.