A50.0 ml urine sample has a mass of 50.7 g. what is the specific gravity of the urine sample?

1014

Explanation:

Specific gravity is also known as relative density, which is the ratio of the density of a substance to a reference substance usually water.

density = mass/volume

mass of urine = 50.7g

volume of urine = 50mL

density of urine =  

                          =1014g/L

density of water = 1g/L

specific gravity of urine sample = 1014/1

                                             = 1014      

Its a dimensionless quantity as the units cancel out

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