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by BlastRoom
Practice calculating how much of a compound's mass comes from each element.
#chemistry
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
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Earn blasts, then hunt the other team.
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More correct answers pulls the rope your way.
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Using C = 12.01 g/mol and O = 16.00 g/mol, what percent by mass of CO2 is oxygen?
For H2O, use H = 1.01 g/mol and O = 16.00 g/mol. Which value is the percent by mass of hydrogen?
A student finds the formula mass of NaCl using Na = 22.99 g/mol and Cl = 35.45 g/mol. What percent by mass is sodium?
Using Mg = 24.31 g/mol and O = 16.00 g/mol, calculate the percent by mass of oxygen in MgO.
For CaCO3, use Ca = 40.08 g/mol, C = 12.01 g/mol, and O = 16.00 g/mol. What percent by mass is calcium?
Using N = 14.01 g/mol, H = 1.01 g/mol, and O = 16.00 g/mol, what percent by mass of NH4NO3 is nitrogen?
Glucose is C6H12O6. Using C = 12.01, H = 1.01, and O = 16.00 g/mol, what percent by mass is carbon?
Find the percent by mass of aluminum in Al2O3 using Al = 26.98 g/mol and O = 16.00 g/mol.
A 25.0 g sample of a compound contains 10.0 g of calcium. What is the percent by mass of calcium in the sample?
A 12.5 g sample contains 3.75 g of hydrogen. Which percent by mass is hydrogen?
A mineral sample has a mass of 48.0 g and contains 18.0 g of magnesium. What percent by mass is magnesium?
In a 7.20 g compound sample, 2.16 g is sulfur. What is the percent by mass of sulfur?
A 50.0 g sample of a compound is 42.1% carbon by mass. What mass of carbon is in the sample?
An 80.0 g compound sample is 25.0% oxygen by mass. How many grams of oxygen are present?
A 15.0 g sample of a compound is 60.0% chlorine by mass. What mass of chlorine does the sample contain?
A compound sample has a mass of 125 g and is 8.00% hydrogen by mass. What mass of hydrogen is in the sample?
Using H = 1.01, C = 12.01, O = 16.00, Mg = 24.31, and Ca = 40.08 g/mol, which compound has the greatest percent by mass of oxygen?
Using H = 1.01, C = 12.01, N = 14.01, O = 16.00, and Cl = 35.45 g/mol, which compound has the smallest percent by mass of hydrogen?
Using N = 14.01, O = 16.00, H = 1.01, and Ca = 40.08 g/mol, which compound has the greatest percent by mass of nitrogen?
Using H = 1.01, S = 32.06, O = 16.00, Mg = 24.31, and Fe = 55.85 g/mol, which compound has the greatest percent by mass of sulfur?
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Same question on every screen. Fastest wins.
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The Mole Ratio from a Balanced Equation
40 questions
