Which of the following aqueous solutions has the lowest vapour pressure at 25 °C? (Sucrose is a non-electrolyte.)
0.025 mol kg-1 Ca(NO3)2
0.100 mol kg-1 CaSO4
0.075 mol kg-1 sucrose
0.050 mol kg-1 Naci
0.100 mol kg-1 KNO3

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

a patient chooses to not take a beneficial medical treatment.

explanation:

the answer is na (sodium)