% COMPOSITION AND MOLECULAR FORMULAS
LEARNING TARGET: STUDENTS WILL BE ABLE TO CALCULATE A PERCENT FOR THE AMOUNT OF ATOMS IN A COMPOUND AND CALCULATE THE FORMULA WITH DATA THAT GIVES PERCENTS.
Practice Problems
1.Qualitative analysis shows that a compound contains 32.38% sodium, 22.65% sulfur, and 44. 99% oxygen. Find the empirical formula of this compound.
2. Analysis of a 10.150 g sample of a compound known to contain only phosphorus and oxygen indicates a phosphorus content of 4.433 g. What is the empirical formula of this compound?
3. Find the composition of copper(I) sulfide, Cu2S.
2. Analysis of a 10.150 g sample of a compound known to contain only phosphorus and oxygen indicates a phosphorus content of 4.433 g. What is the empirical formula of this compound?
3. Find the composition of copper(I) sulfide, Cu2S.