Help pls! The electrolysis of water forms H2 and O2.

2H2O Right arrow. 2H2 + O2

What is the percent yield of O2 if 10.2 g of O2 is produced from the decomposition of 17.0 g of H2O?

Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100..

15.1%

33.8%

60.1%

67.6%

if you're asking what comes out, it's steam.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

football

explanation:

because it is