Question

Antimony can react with chlorine gas to give antimonytrichloride.

_____ Sb(s) + _____ Cl2(g)?_____ SbCl3(l)
Which of the following is the best set of stoichiometric coefficients to balance this equation?
(a) 1, 1, 1
(b) 1, 3, 2
(c) 4, 6, 4
(d) 2, 3, 2

(iv) The very stable compound SF6 is made by burning sulfur in an atmosphere of fluorine.

S8(s) + 24 F2(g)?8 SF6(g)
If you need 2.50 moles of SF6, you will need to use (a) 0.313 moles of S8 and 7.50 moles of F2.
(b) 1.00 moles of S8 and 24.0 moles of F2.
(c) 0.125 moles of S8 and 3.00 moles of F2.

(d) 8.00 moles of S8 and 24.0 moles of F2.

(v) Nitrogen gas can be prepared in the laboratory by the reaction of ammonia with copper(II)oxide according to the following unbalanced equation.
NH3(g) + CuO(s)?N2(g) + Cu(s) + H2O(g)

If you pass 26.3 g of gaseous NH3 over a bed of solid CuO (in stoichiometric excess), how many grams of N2 can be isolated?

(a) 21.6 g
(b) 28.8 g

(c) 43.3 g

(d) 86.5 g

If anyone can give proper well worked out, easy to understand solutions than that would be muchly appriciated!

Thanks

Answer 1