Answer:
44.28 grams.
Explanation:
Let us write the balanced reaction:
As per balanced equation, six moles of fluorine gas will give four moles of PF₃.
The mass of PF₃ required = 120 g
The molar mass of PF₃ = 88g/mol
Moles of PF₃ required =
The moles of fluorine gas required = 
the mass of fluorine gas required = moles X molar mass = 0.91x38 = 34.58g
Now this much mass will be required if the reaction is of 100% yield
But as given that the yield of reaction is only 78.1%
The mass of fluorine required = 
Answer:
The answer to your question is letter C. 3
Explanation:
Unbalanced chemical reaction
C₂H₄ + O₂ ⇒ CO₂ + H₂O
Reactants Elements Products
2 C 1
4 H 2
2 O 3
Balanced chemical reaction
C₂H₄ + 3O₂ ⇒ 2CO₂ + 2H₂O
Reactants Elements Products
2 C 2
4 H 4
2 O 6
The coefficient of Oxygen is three.
Answer:
D. works with bones to help you move
Explanation:
Your muscles and tendons are what help bones move.
Answer:
7.7×10^-6
Explanation:
CoCO3(s)<--------> Co^2+(aq) + CO3^2-(aq) Ksp= 1.0 ×10 ^-10
Co^2+(aq) + 6NH3(aq) <-----------> [Co(NH3)6]^2+. Kf = 7.7×10^4
Overall:
CoCO3(s) + 6NH3(aq) <--------> [Co(NH3)6]^2+(aq) + CO3^2-(aq) Knet= Ksp× Kf
Knet= Ksp× Kf = 1.0 ×10 ^-10 ×7.7×10^4= 7.7×10^-6
The insoluble CoCO3 dissolves in the presence of ammonia because bof the formation of hexamine cobalt II complex ion.
