What is the mass, in grams of 2.80 l of co2 at stp (standard pressure)?
-the topic i'm learning is gas laws

Assuming that CO2 is an ideal gas, we use the equation PV=nRT to determine n and multiply by molar mass to obtain mass. At STP, temperature is equal to 298.15 K and pressure is 1 atm.

PV = nRT
n = PV / RT
n = 1 (2.80) / 0.08205 (298.15)
n = 0.1145 mol
mass = 0.1145 ( 44.01 ) = 5.04 g CO2

Because it was a dramatically big guy

Answer:

a. energy is absorbed in the reaction.

explanation:

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.