Select all of the following choices that would be a nonconducting substance or dissolved in water)a. sucrose c12h22o11b. cacl2c. bef2d. baf2e. distilled water

A. Sucrose

D. Distilled water

Explanation:

Nonconductive substances are those  that are covalently bonded. To have a conductive  solution  we have to  have ions in  solution, with that in mind lets answer the question:

A. Sucrose C₁₂H₂₂O is an organic compound which we know are made of C. H and O (in this case) atoms with covalent bonds.

B  CaCl₂ is an ionic compound, as are C BeF₂ and D BaF₂ from metals (Ca, Be, Ba) and Halogens Cl, F  ( nonmetal). Remember when have compounds from groups I and II and VII we have ionic compounds where the metal ion gives  up its electrons and the halogens, in this case gain those electrons.

Distill water since it is pure (i.e, does not have ions dissolved) and is a covalent substance is nonconducting.

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.