Which of these molecules is polar?
A. BCI3
B. O₂
C. N2
D. NO

Answer i think u meant to write PCl3 instead of BCl3

:Taking the example of BCl3 and NH3, you have non-polar BCl3 (because of its flat geometry and symmetrical distribution of electrons) forming a polar non-covalent bond with the NH3 molecule (polar because of its tetrahedral geometry with a lone-pair of electrons attached to the nitrogen).

Polar molecules are SO2, CH2Cl2 and PCl3 are Polar molecules.

Explanation:

Water (H2O) is a polar molecule. ...  

Ethanol is polar because the oxygen atoms attract electrons because of their higher electronegativity than other atoms in the molecule.  

Ammonia (NH3) is polar.

Sulfur dioxide (SO2) is polar.

Hydrogen sulfide (H2S) is polar.

Jan 21, 2020

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2