Question

Find the number moles of argon in 452g of argon

Answer 1

11.3 moles Ar

Step-by-step explanation:

Given that the molar mass is 39.948 grams of Ar per mole of Ar, and we have 452 g Ar. We must use the equation m = g / mm where m is moles, g is grams given, and mm is the molar mass of an element. Using this equation we obtain 11.3147 mol Ar, but adhering to the rules of sig figs we get 11.3 mol Ar.