Moles and Particles
The total number of particles contained in exactly one mole of any substance.
6.02 x 1023 particles.
In the reaction 2H2 + O2 --> 2H2O, find the mole ratio of H2 consumed to H2O produced.
1:1
The exact volume in liters occupied by 1 mole of any gas at STP.
22.4 Liters
In the alpha decay of Uranium-238, this is the mass number of the resulting daughter isotope.
234
The chemical formula for the neutral gas that contains 1.204 x 1024 total hydrogen atoms in 1 mole.
H2
Find the number of moles of H2 needed to react completely with 2 moles of N2
6 moles
The standard temperature value in Celsius used for STP gas calculations.
0o C
Clue: In the beta-minus decay of Carbon-14, this is the atomic number of the daughter product.
7
Find the exact number of moles present in a sample containing 3.011 x 1023 atoms of gold.
0.5 moles.
Find the mass in grams of NH3 when 1 mole of N2 reacts completely
34 grams
The number of moles contained in 11.2 Liters of a gas at STP.
0.5 moles
When Carbon-11 undergoes positron emission, this is the atomic number of the resulting isotope.
5
What is the the physical unit used when expressing Avogadro’s constant in calculations?
Particles per mole.
Find the total mass of H2 gas required to produce 2 moles of NH3.
6 grams.
The mass in grams of 22.3 Liters of helium gas at STP
4.00 grams
Iodine-131 has a half-life of 8 days. If you start with a 40 g sample, this is the mass in grams that remains after 24 days.
5 grams