Based on the equation of the reaction, the moles of chlorine gas initially in the vessel is 0.12 moles
<h3>How many moles of chlorine were initially present?</h3>
The moles of chlorine initially present is determined using the equation of the reaction:
At STP, 1 mole of P4 reacts with 6 moles of chlorine.
Molar mass of P4 = 124.0 g
Molar mass of chlorine = 71.0 g
Mass of P4 in reaction vessel = 250 mg = 0.25g
moles of P4 in 0.25 g = 0.25/124 = 0.02 moles
0.02 moles of P4 will react with 0.02 × 6 moles of chlorine = 0.12 moles of chlorine.
Therefore, the moles of chlorine gas initially in the vessel is 0.12 moles.
Learn more about moles of a gas at: brainly.com/question/25417922
