Stoichiometry

Front

What unit is used to measure the number of particles in a substance? Options: kilogram, mole, Liter, dozen

Back

mole

Front

How many oxygen atoms are in 5 molecules of Mohr's salt: (NH₄)₂Fe(SO₄)₂?

Back

40

Front

A sealed container of nitrogen gas contains 6 × 10²³ molecules at STP. As the temperature increases, the mass of the nitrogen will

Back

remain the same.

Front

At STP, 32.0 g of O₂ would occupy the same volume as: 64 g of H₂, 4.0 g of He, 12.0 g of CH₄, 7.0 g of N₂

Back

4.0 g of He

Front

At STP, what mass of CH₄ has the same number of molecules as 18.0 grams of H₂O?

Back

16.0 g

Front

The atomic masses of any two elements contain the same number of ____.

Back

atoms

Front

Which mass contains 6.02 × 10²³ atoms? Options: 6.0 g of carbon, 3.0 g of helium, 28.0 g of silicon, 16.0 g of sulfur

Back

28.0 g of silicon

Front

Which represents the greatest mass? Options: 1 mole of argon, 1 molecule of argon, 1 gram of argon, 1 atom of argon

Back

1 mole of argon

Front

Total number of molecules in 0.50 mole of O₂ at STP?

Back

3.01 × 10²³

Front

Minimum moles of O₂ needed to produce 1 mole of CO₂ in the reaction: 2 CO + O₂ → 2 CO₂?

Back

0.50