C. 28.7 g
One mole of sodium metal weighs 22.99 grams. 22.99×1.25=28.7375, which rounds to 28.7.
Ohm's law defines the relationship between the voltage, current<span>, and </span>resistance<span> in an electric </span>circuit<span>: i = v/r. The </span>current<span> is directly proportional to the voltage and inversely proportional to the </span>resistance<span>.</span>
Answer:
The molar amount of the gas.
Explanation:
If the pressure, volume, and temperature of a gas are known than molar amount can be determine.
Formula:
PV = nRT
P = pressure
V = volume
R = general gas constant
T = temperature
n = number of moles
Example:
V = 2 L, P = 1 atm , T = 273 K , R = 0.0821 atm. L/mol.K
n = PV/RT
n = 1 atm. 2 L / 0.0821 atm. L/mol.K . 273 K
n = 2 / 22.413 /mol
n = 0.09 mol
Since there is more energy added as heat rises, the particles disperse and have larger movements.
