In order to calculate the mass of nitrogen, we must first calculate the mass percentage of nitrogen in potassium nitrate. This is: % nitrogen = mass of nitrogen / mass of potassium nitrate % nitrogen = 14 / 101.1 x 100
The mass of nitrogen = % nitrogen x sample mass = (14 / 101.1) x 101.1 = 14 grams
The molar weight of nitrogen is 14. Each mole of urea contains two moles of nitrogen. Therefore, for there to be 14 grams of nitrogen, there must be 0.5 moles of urea. Mass of urea = moles urea x molecular weight urea Mass of urea = 0.5 x 66.06 Mass of urea = 33.03 grams
By giving the dog 2 or more different dog foods and seeing what one he eats the must of and the variables u control is how much you give the dog and the hypothesis is if I give the dog two or more different kinds of dog food than we will see what one he/she like the most
