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

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6