allisonchorath6971
01.07.2019 •
Chemistry
Given the reaction: p4(l) + 6 cl2(g) → 4 pcl3(l) if the percent yield is 82%, what mass of p4 is required to obtain 2.30 g pcl3 (cl2 in excess)?
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Ответ:
The mass of P4 required to obtain 2.30 PCl3 0.694 g
calculation
p4 + 6 Cl2→ 4 pcl3
step 1:calculate the moles of PCl3
moles= mass/molar mass
from periodic table the molar mass of PCl3 = 31 + (3 x35.5) = 137.5 g/mol
moles = 2.30 / 137.5 =0.0167 moles
step 2: use the mole ratio to find the moles of P4
from equation above the mole ratio of p4 :PCl3 is 1:3 therefore the moles of p4
= 0.0167 x1/3 =0.0056 moles
step 3: find the mass of P4
mass = moles x molar mass
from periodic table the molar mass of P4 = 31 x4= 124 g/mol
mass = 0.0056 x 124 = 0.694 g
Ответ:
u i think its a carrot
Explanation:
i aint sure but i think is a carrot