Skip to main content

My Courses

Calculators AI Tools Study Prep Blog Study Prep Home

3. Chemical Reactions

Mass Percent

3. Chemical Reactions

Mass Percent

Open Question
Calculate the percentage by mass of lead in Pb(NO₃)₂.
850
views
Multiple Choice
Determine the percent composition of nitrogen and oxygen with nitrogen dioxide, NO₂.
2846
views
24
rank
1
comments
Multiple Choice
A 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?
719
views
Multiple Choice
A nitrogen oxide is 63.65% by mass nitrogen. The molecular formula could be:
1516
views
Multiple Choice
The 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?
686
views
Multiple Choice
Based on the amounts of reactants used the calculated amount of product that can form for a given reaction was 20.76 g. When the reaction was carried out in a laboratory 17.34 g of product was recovered. What is the percent yield for this reaction?
585
views
Open Question
A compound whose empirical formula is XF₃ consists of 65% F by mass. What is the atomic mass of X?
654
views
Open Question
What is the mass % of carbon in dimethylsulfoxide (C₂H₆SO) rounded to three significant figures?
749
views
Open Question
Calculate the mass percent composition of lithium in Li₃PO₄.
799
views
Open Question
What is the percentage of nitrogen, by mass, in calcium nitrate?
795
views
Open Question
What is the percent composition for carbon and hydrogen in ethane C₂H₆?
622
views