Answer: The empirical formula is 
Explanation:
Mass of Pb = 4.33 g
Mass of O = (5.00-4.33) g = 0.67 g
Step 1 : convert given masses into moles
Moles of Pb =
Moles of O =
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For Pb = 
For O = 
The ratio of Pb O= 1: 2
Hence the empirical formula is
Answer:
Report to your instructor
Explanation:
Always report an accident to your instructor. For more like this, I would suggest Crash Course Chemistry Lab Safety with Hank Green
Secondary Alcohol is converted into corresponding Cyanohydrin in two steps;
Step 1: Oxidation of Sec. Alcohol: Secondary Alcohols when treated with Sodium Dichromate in acidic medium are converted into corresponding Ketone.
Step 2: Reduction of Ketone using HCN: Ketone is reduced to Cyaynohydrin when treated with CN nucleophile. A nucleophillic addition reaction takes place.
Answer:
57.4 g
Explanation:
30.4 g Al will produce 57.4 g Al 2 O 3 30.4 g O 2 will produce 64.6 g Al
2 O 3 .The limiting reagent is aluminum, and the maximum amount of aluminum oxide that can be produced in this reaction is 57.4 g
