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Chemical Formula: Finding the Mass Percent of Oxygen in Ethanol

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Wize University Chemistry Textbook > Stoichiometry

Mass Percentages

3 Activities

What is the mass percentage of oxygen in ethanol (C2H5OH) ?
More Mass Percentages Questions:
An oxide of nitrogen contains 36.5% oxygen by mass. What is the empirical formula of the oxide?
Elements: Mass Percentage
A metal oxide with the formula M2O3 is 47.06 % oxygen by mass. What is the identity of the metal, "M"?
Mass Percentage II
A certain metal hydroxide with the formula M(OH)2 is 17.22 % oxygen by mass. What is the identity of the metal, "M" ?
Gas Stoichiometry
A 1.8 g mixture of KClO3 and KCl was heated until the complete decomposition of KClO3. The released O2 has a volume of 405 mL at 25 ⁰C and 745 Torr. What was the percent of KClO3 present in the mixture?
Elements: Mass Percentage
A metal oxide with the formula M2O3 is 21.2 % oxygen by mass. What is the identity of the metal, "M"?
Mass Percentage
A certain metal hydroxide with the formula M(OH)2 is 17.22 % oxygen by mass. What is the identity of the metal, "M" ?
Stoichiometry: Mass percentage
A 2.56 g sample of ZnSO4 ⋅ 7H2O is heated to dryness. Determine the anhydrous mass remaining after all the water has been driven off. (provide an answer with 2 decimal places and correct unit)
Stoichiometry: Mass percentage
Sodium Bicarbonate (NaHCO3) is a very common chemical frequently used in the food industry. Find the mass percentages of each element in sodium bicarbonate.
Round answers to the nearest percentage. If you think an answer is 60% for example, just enter 60 in the blank.
Chemical formula: Mass percentage
What is the mass percent of oxygen in Calcium carbonate, CaCO3\rm CaCO_3?
What is the mass percentage of copper in CuSO4?
Sodium Bicarbonate (NaHCO3) is a very common chemical frequently used in the food industry. Find the mass percentages of each element in sodium bicarbonate.