The answer to this question is b hope this helps you out
Option D: 246 K
According to ideal gas law:
...... (1)
Here, P is pressure, V is volume, n is number of moles, R is Universal gas constant and T is temperature of the gas. The value of R is
.
Number of moles of gas are 0.750 mol, volume of cylinder is 6850 mL and pressure of gas is 2.21 atm.
First converting volume from mL to L

Thus,
6850 mL=6.850 L
Putting the values in equation (1),

Rearranging
,
Therefore, temperature of the gas is 246 K.
Answer:
CaCO3( s ) → CaO( s ) + CO2( g )
Calcium carbonate will react with water that is saturated with carbon dioxide to form the soluble calcium bicarbonate. This reaction is important in the erosion of carbonate rock, forming caverns, and leads to hard water in many regions.
Answer:
Helium, Krypton, Neon, Argon, Radon, Oganesson and Xenon.
Explanation:
Both evaporation and condensation are in the water cycle. evaporation is when water changes from liquid to gas meanwhile condensation is when water vapor cools and goes from gas to liquid.