At 20 Celsius skim milk has a density of 1.033 kilos per liter while light cream has a density of 1.012 kilos per liter. at 20 Celcius, what is the mass of one gallon of skim milk if 1 liter is approximately 0.264 gallons?

Mass of 1 gallon skim milk is 3.92 kg.

Explanation:

Density is the ratio of mass to volume.

Density = (mass)/(volume)

0.264 gallons = 1 L

So, 1 gallon = = 3.79 L

So, mass of 3.79 L of skim milk = (density of skim milk)(volume of skim milk)

                                                    =

                                                    = 3.92 kg

So, mass of 1 gallon skim milk is 3.92 kg.

h let me think

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.