Percent Composition
Empirical Formula
Random
Random
Random
100

What is the percent composition of nitrogen in ammonium sulfate (NH4)2 SO4?

What is 21.2%?

100

A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the empirical formula of the compound?

What is CH₂O?

100

How many particles are in 1 mole?

What is 6.022 x 1023?

100

What is the molar mass of KCl?

What is 74.55 g/mol?

100

How many moles are in 100g of KCl?

What is 1.34 moles?

200

What is the percent composition of chlorine in calcium chloride, CaCl2?

What is 63.8%?

200

A sample of a compound is found to contain 1.40 g of carbon, 0.30 g of hydrogen, and 0.96 g of oxygen. What is the empirical formula of the compound?

What is C2H5O?
200

How many moles is 6.022 x 1024 particles?

10 moles


200

How many grams are in 1.0 moles of FeOH?

What is 72.85 g?

200

How many moles are in 100g of FeOH?

What is 1.37 moles?

300

What is the percent composition of oxygen in glucose, C6H12O6?

What is 53.3%

300

A compound contains 20% nitrogen and 80% oxygen by mass. What is the empirical formula of the compound?

What is N2O7?

300

How many particles are in 0.5 moles?

What is 3.011 x 1023 particles?

300

What is the molar mass of Fe(OH)2?

What is 89.86 g/mol?

300

How many grams are in 2.0 moles of KCl?

What is 149.1 g?

400

What is the percent composition of carbon in carbon dioxide, CO2?

What is 27.3%?

400

A compound has the following composition by mass: 21.5% sodium, 32% sulfur, and 47.5% oxygen. What is the empirical formula?

What is Na₂SO₃?

400

How many moles is 6.022 x 1022 particles?

What is 0.1 moles?

400

What is the molar mass of H2SO4?

What is 98.079 g/mol?

400

How many grams are in 2.0 moles of FeOH?

What is 145.7 g?

500

What is the percent composition of hydrogen in water, H2O?

What is 11.1%?

500

A compound consists of 70.6% sulfur and 29.4% oxygen by mass. Determine the empirical formula of the compound.

What is SO5?

500

What is the molar mass of NH4NO3?

What is 80.043 g/mol?

500

How many grams are in 10 moles of Fe(OH)2?

What is 898.6 g?

500

How many moles are in 100g of water?

What is 5.56 moles?

M
e
n
u