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
The answer is A) Water has surface tension. This is the correct answer because water allows animals and really light items to rest upon the top of the water. Hope This Helps! If you could mark me as the brainiest answer, that would be amazing. I want others to read this answer and know it is accurate. If you need help with another question, just ask. :)
