Question

(3 pts.) 3 If 3.0 moles of potassium react with excess oxygen, how many moles of potassium oxide will form? 4 K(s) + O₂(g) → 2 K₂O(s) (3 pts.) 4 How many grams of potassium oxide can be produced from 4.50 g of K and an excess of O, based on the equation in question 3?

Answer 1

4K + O2 - 2k2o equation According to Balanced 4moles of potassium reacts with 1 mole of a to give a moles of potassiumoxide 4 moles of k 3 moles of t gives gives a moles of K₂o a moles x = 2x3 = 1.5 moles of K₂0 A So, according to Balanced equation 4x689)gm of potassium gives 2x(39x2 +16)gm - of K₂O = 188gm 150gm 4Sо т о к аж. 1 3т , Бо x = 4.50X188 = 5.42 gm of ko I56