Answer:
The red dot represents the melting point of the element, which as stated is approximately 19.9 degrees Celsius and how long it took for the heat to properly completely dissolve it.
The question kind of answers itself however, is there a way to re-word it or is there a different answer you're looking for?
Answer:
P = 0.1 atm
Explanation:
Given data:
Volume = 1.25 L
Temperature = 25.2 °C
Mass of gas = 0.235 g
R = 0.08206 L. atm/°C. mol
Pressure = ?
Solution:
first of all we will calculate the number of moles.
Number of moles = mass / molar mass
Number of moles = 0.235 g/ 4g/mol
Number of moles = 0.06 mole
For pressure:
PV = nRT
P = nRT / V
P = 0.06 mol × 0.08206 L. atm/°C. mol × 25.2°C / 1.25 L
P = 0.124 L. atm / 1.25 L
P = 0.1 atm
The answer is C because kinetic energy is energy which a body possesses by virtue of being in motion.