Question

How many grams of O2 are needed to react completely with 12.8 grams of K?

K + O2 yields K2O

Be sure to balance the equation.

2.62 grams
10.4 grams
51.2 grams
62.6 grams

Answer 1

i balenced the equation4K + O2 ---> 2K2O

Answer 2

@Abmon98

Answer 3

@ganeshie8

Answer 4

@Luigi0210 @e.mccormick @Eli_Moses @emmigrace222 @JuliusTheGreat @jdoe0001 @JhonyLovesSchool @zepdrix @ZekeWars

Answer 5

Balance the Chemical Equation
4K+O2-->2K2O
Number of Moles=Mass(g)/Molar Mass(g/mol)
12.8/39.0=0.328 moles of K
Ratio of Moles of K to O2
4:1
0.328:x moles of oxygen
0.328*1/4=0.08205 moles of oxygen
Mass=Molar Mass*Number of Moles
Mass=0.08205*(16*2)

Answer 6

i got the answer to be the A

Answer 7

Yes that's right

Answer 8

thanks to you!

Answer 9

Your welcome :')