When electricity passes through water (H20), the water breaks down to form hydrogen gas (Hz) and oxygen gas (02).
Which equation represents this chemical reaction?
4 of 4 QUESTIONS
2H2 +02-2H20
2H2O → 2H2 + O2
2H20 + 02 → 2H2
2H20 + 2H2 - 02

A, C, & E

Step-by-step explanation:

A. The data for elementary school are more consistent than those for middle school.

C. About 50% of elementary school students watch between 4 and 7 hours of television each week.

E. On average, middle school students watch less television than elementary school students each week.