Which of the following solutions is a buffer?A) A solution made by mixing 100 mL of 0.100 M HClO and 50 mL of 0.100 M HCl. B) A solution made by mixing 100 mL of 0.100 M HClO and 500 mL of 0.100 M NaOH. C) A solution made by mixing 100 mL of 0.100 M KClO and 50 mL of 0.100 M KCl. D) A solution made by mixing 100 mL of 0.100 M HClO and 50 mL of 0.100 M NaOH.

D

Explanation:

solution made by mixing 100 mL of 0.100 M HClO and 50 mL of 0.100 M NaOH Can resist pH change when there is little addition of either acid or base, hence it is a buffer solution

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

i just learnt this recently but i need to look through my notes again