Answer: A
Explanation: the first answer is more reasonable than the rest of them , hope this helped
Answer: it is the 4th option in there
Explanation:
Answer:
46.71g
Explanation:
First, we'll begin by calculating the number of mole of KNO3 present in the solution. This is illustrated below below:
Data obtained from the question:
Molarity = 2.50 M
Volume = 185 mL = 185/1000 = 0.185L
Mole =?
Molarity = mole /Volume
Mole = Molarity x Volume
Mole = 2.5 x 0.185
Mole = 0.4625 mole
Now we can obtain the mass of KNO3 as follow:
Molar Mass of KNO3 = 39 + 14 + (16x3) = 39 + 14 + 48 = 101g/mol
Number of mole of KNO3 = 0.4625 mole
Mass of KNO3 =?
Mass = number of mole x molar Mass
Mass of KNO3 = 0.4625 x 101
Mass of KNO3 = 46.71g
