Multiple Choice
Morphine has the molecular formula C17H19NO3. What is the mass percent of oxygen in morphine?
1
views
3. Chemical Reactions
Mass Percent
Back3. Chemical Reactions
Mass Percent
- Multiple ChoiceWhat is the mass percent of carbon in carbon monoxide (CO)?
- Multiple ChoiceA 70.0-g iron nail combines with 30.0 g of oxygen to form rust. What is the total mass of the iron nail plus the rust that forms?3views
- Open Question
An oxide of iron has the formula Fe3O4. What mass percent of iron does it contain
- Multiple ChoiceThe following data were collected when analyzing a compound used in dentistry as a cement to repair teeth:
50.82% Zn;16.04% P;33.14% O
What is the empirical formula of the compound?1views - Multiple ChoiceA sample of white gold contains 18.0 g gold, 3.0 g silver, 2.0 g cobalt, and 1.0 g platinum. What is the mass percent of platinum in the sample?
- Open Question
What is the mass % of carbon in dimethylsulfoxide (C2H6SO) rounded to three significant figures?
1views - Multiple ChoiceWhat is the mass percent of water in Ca(NO3)2 · 4 H2O? Provide your answer to two decimal places.
- Multiple ChoiceA 20.0 mL sample of a 15.5% (m/v) KBr solution is taken. What mass of KBr (in grams) is present in this sample?2views
- Multiple ChoiceWhat is the mass percent of phosphorus in Zn3(PO4)2?
- Multiple ChoiceCodeine has the molecular formula C17H19NO3. What is the mass percent of carbon (C) in codeine?
- Open Question
Calculate the percentage by mass of lead in Pb(NO3)2.
1views - Multiple ChoiceWhich one of the following compounds has the smallest mass percent of fluorine (F)?
- Open Question
What is the mass percentage of c in caffeine, C8H10N4O2? Provide an answer to two decimal places.
1views - Multiple ChoiceWhat is the mass percent of oxygen in C2H6O (ethanol)?1views