300 grams of an organic sample which contains only carbon, hydrogen and oxygen is analyzed and found to contain 145.946 grams of carbon, 24.3243 grams of hydrogen
and the rest is oxygen. What is the empirical formula for the compound?

C2H3O

Explanation:

Use mass to find percentage composition

Find empical formula

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

answer; talc and gypsum;