Moles
What is Avogadro's number?
6.02 x 1023
Determine the mass in grams of 3.00 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)
0.373 g
Balance the following chemical reaction.
__NH₃(g) + __CuO(s) → __Cu(s) + N₂(g) + __H₂O(g)
2NH₃(g) + 3CuO(s) → 3Cu(s) + N₂(g) + 3H₂O(g)
Which one of the following contains the most moles of hydrogen atoms?
B) 10 mol CH₃OH
Calculate the mass, in grams, of 202 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).
1.87 × 10⁻²⁰ g
How many moles of NH₃ can be produced from 3.76 moles of nitrogen in the following reaction:
N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)
7.52 mol
How many atoms are in 1.2 mol of carbon?
7.2 × 10²³ atoms
What is the mass in grams of 25.60 moles of KCl?
1908 g
Determine the quantity in moles of Ag that are in 43.6 grams of Ag₂O.
0.376 mol
Determine the molar mass of a substance if 0.385 moles has a mass of 152 g.
395 g/mol
How many molecules are in 50.8 moles of CCl₄?
3.06 × 10²⁵ molecules
If 4.9 kg of CO₂ are produced during a combustion reaction, how many molecules of CO₂ would be produced?
6.7 × 10²⁵ molecules
Determine the number of atoms of C in 15.0 grams of C₆H₁₂O₆.
3.01 × 10²³ atoms
The density of helium in a balloon is 1.18 g/L. If a balloon holds 2.93 L of He, how many atoms of He are in the balloon?
5.21 × 10²³ atoms
How many moles of ammonia would be required to react exactly with 0.470 moles of copper(II) oxide in the following chemical reaction?
2 NH₃(g) + 3 CuO(s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)
0.313 mol