Mass before reaction test tube HCla stir bar capsule 26042

Mass (before reaction): test tube + HCl(a) stir bar capsule 26.042 g Mass (after reaction): test tube + HCl(aq)stir bar capsule 25.783 g Volume of water displaced from the squirt bottle Temperature of the CO2(g) CO2(g) pressure Calculate each of the items below to three significant figures. Enter only the numerical 144 mL 293.6 K 0.986 atm value in the answer box. a. Calculate the mass of CO2(g) b. Calculate the moles of Co 29) c. Calculate the density of Co2lg) in g/L d. Calculate the molar mass of CO2 assuming a temperature of 293.6 K 57

Solution

A) mass of CO2 = reduction in mass after reaction
= 26.042 g - 25.783 g
= 0.259 g

B) using ideal gas equation , PV = nRT , we have
moles = n = P*V / R*T = (0.986 atm x 0.144 L ) / (0.0821 x 293.6 K)
= 0.0059 mole

C) density of CO2 = mass / volume in liter = 0.259 g / 0.144 L = 1.799 g/L

D) molar mass of CO2 = mass / moles = 0.259 g / 0.0059 mole = 43.9 g/mole