To simplify our solutions, we have to assume that the gas we are referring is ideal. The kinetic energy of of ideal gas is a funtion of moles and temperature only.
KE = (3/2)(nRT)
= (3/2)(1mol)(8.314J/molK)(100+273.15) = 4204.6J
Answer:
133.33 g/mole
Explanation:
To get the molar mass, you will need to first determine the atoms in the compound.
AlCl₃
We have aluminum (Al) and Chlorine (Cl)
Next step is to determine how many atoms of each element you have in the compound. The subscript will tell you how many. If you see no subscript, that means 1 atom.
Al = 1 atom
Cl = 3 atoms
Then you multiply the number of atoms by the atomic weight to get the molar mass of each element and add them up to get the total molar mass of the compound:
Element # of atoms atomic weight molar mass
Al 1 x 26.98 g/mole = 26.98 g/mole
Cl 3 x 35.45 g/mole = <u>106.35 g/mole</u>
TOTAL = 133.33 g/mole
Some examples are the wall, wood, tv's, desk, metal, doors, and books
Answer: When a pendulum is at the bottom of its swing, it has kinetic energy.
Explanation: At the bottom of a swing, the greatest speed is achieved. Speed/Velocity equals Kinetic Energy, as potential energy is when speed is at its lowest.
There are a lot of missing information in this problem. I've found a similar problem which is shown in the attached picture. Let's just use the information there that we don't have here.
From the principle of conservation of energy:
Heat of dry ice + Heat of water = 0
Heat of dry ice = - Heat of water
(m of dry ice)ΔH = -(m of water)(Cp)(ΔT)
where Cp for water is 4.187 kJ/kg·°C
Hence,
(m of dry ice)(ΔH°g - ΔH°s) = -(Density*Volume)(Cp)(ΔT)
where the density of water is 1 kg/L and the molar mass of dry ice is 44 g/mol.
Then,
(m of dry ice)(-393.5 - -427.4 kJ/mol)(44 g/mol) = -(1 kg/L*12L)(4.187 kJ/kg·°C)(16 - 88 °C)
Solving for m of dry ice,
<em>Mass = 2.43 g of dry ice</em>