Answer: is the same for all substances.
Explanation:
The number of molecules in one mole of a substance is the same for all substances because
A mole (which is the quantity of a substance that has the same number (Avogadro's number, is 6.022 * 10^23) of particles as are found in 12.000 grams of carbon-12 of the substance) for any substance has the same number of atoms, molecules, or ions contained in any other substance.
1 mole = 6.022 x 10^23 atoms, molecules, or ions
Answer:
156 g
Explanation:
Let's consider the following reaction.
2 NaN₃(s) → 2 Na(s) + 3 N₂
(g)
We can find the moles of N₂ using the ideal gas equation.
P × V = n × R × T
1.50 atm × 60.0 L = n × (0.08206 atm.L/mol.K) × 305 K
n = 3.60 mol
The molar ratio of N₂ to NaN₃ is 3:2. The moles of NaN₃ are:
3.60 mol N₂ × (2 mol NaN₃ / 3 mol N₂) = 2.40 mol NaN₃
The molar mass of NaN₃ is 65.01 g/mol. The mass of NaN₃ is:
2.40 mol × 65.01 g/mol = 156 g
To determine the temperature of the gas, we need an expression which would relate the average speed of the molecules of the gas and the temperature. From my readings, it is said that the average kinetic energy ( energy of an object in motion) of the molecules of a gas is directly related to the temperature of the gas system. Since velocity or speed is directly related to kinetic energy, it should be that temperature is directly related to the average speed. The expression would be:
<span>v^2 = 3RT/M
</span>(1.90x10^5)^2 = [3(8.314)T] / [44.0(1/1000)]
T = 63683746.3 K
The temperature would be 63683746.3 K.
Answer: Below (=
Explanation:
There is no space between the individual particles, so they cannot pack together. The kinetic-molecular theory explains why gases are more compressible than either liquids or solids. Gases are compressible because most of the volume of a gas is composed of the large amounts of empty space between the gas particles.
80 liters of water
this is a mixture problem.
75% x 20 = 1500 (acid solution)
0 x X = 0 (water)
15 x 20+x = 300 + 15x
looking at column 3, we get 1500+0 = 300+15x
using properties, x=80
