Answer:
5.53 grams
Step-by-step explanation:
How many grams of potassium chloride are produced from 2.70 g of
potassium?
Potassium chloride = KCl Molar mass: 74.54 g/mol
Potassium = K = 1+ charge = 39.09g/mol
Cl = 1- charge = 35.45
If we only have Potassium well no grams of potassium chloride are produced as we have no chlorine.
If we have some chlorine as well though then
2K + Cl2 = 2KCl
2:1 :2
So same number of moles of K and KCl
2.7grams of K so 2.7g/39.09g/mol = 0.07419 moles
What's the weight of 0.07419 moles of KCl?
0.07419 x 74.54 = 5.53 grams