1) Glucose has the formula C6H12O6. What is the percent composition of oxygen in glucose to three significant digits?   2) A sample of a pure compound contains 68.4% chromium and 31.6% oxygen by mass. What is the empirical formula of this compound? (numbers entered will be considered subscripts)   3) What is the molecular formula of a compound with the empirical formula CH2 if the molecular mass of the compound is 56.10 g/mol?

Question

1) Glucose has the formula C6H12O6. What is the percent composition of oxygen in glucose to three significant digits?

 

2) A sample of a pure compound contains 68.4% chromium and 31.6% oxygen by mass. What is the empirical formula of this compound? (numbers entered will be considered subscripts)

 

3) What is the molecular formula of a compound with the empirical formula CH2 if the molecular mass of the compound is 56.10 g/mol?

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