PLEASE HELP!! How does one determine an empirical formula from a percent composition?
A. Convert mass percents to moles and then use the moles as
subscripts in the formula
B. Convert mass percents to grams and then divide by the smallest
gram value to find subscripts
C. Convert mass percents to moles and then divide by the smallest
mole value to get subscripts
D. Convert mass percents to grams and then divide by the smallest
mass percent value to find subscripts

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

13. calculate the initial concentration (before precipitation) of carbonate ions after the addition of each 0.05 ml of solution b to the 1.00 l beaker of solution a. divide the work among group members and write the answers in the table in model 3. assume the volume change as solution b is added is negligible. 14. notice the initial concentrations of zn2+ - and cu2+ in the table in model 3. a. explain how these were obtained from the data in model 2. b. as solution b is added and precipitates form, do these initial concentrations change? 15. use the data in model 2 to indicate the presence of precipitate (either znco3 or cuco3) after each 0.05 ml addition of solution b in model 3. 16. use the initial concentrations of carbonate ions and zinc ions to calculate the reaction quotient, qsp for the zinc carbonate scenarios in model 3. divide the work among group members and write the answers in the table in model 3. 17. use the initial concentrations of carbonate ion and copper(ii) ions to calculate the qsp for the copper(ii) carbonate scenarios in model 3. divide the work among group members and write the answers in the table in model 3.

Define dew point. i am writing this part to be able to ask the question