Question

calculate the percentage of nitrogen in the following substance
KNO3​

Answer 1

Answer:

Potassium nitrate has the formula KNO3 , so empirically , potassium nitrate has 20 percent nitrogen . < br > I assume that you meant by mass nonetheless , which is nearly as simple . < br > The molar mass of potassium is thirty-nine g/mol . < br > The molar mass of nitrogen is 14 g/mol . < br > The molar mass of oxygen is 6teen g/mol . < br > So , the mass of a mole of potassium nitrates is 101 grams ( thirty-nine + 14 + ( 3 x sixteen ) ) . < br > Of this , nitrogen makes up 14 grams . 14 divided by 101 gives 13.87 percent , which are able rounded down to 13.9 cent . So , your responseing is a .