Which set of coefficients will balance this chemical equation? HELP QUICKLY PLEASE __C2H4 + __O2 → 2CO2 + 2H2O

A. 1, 2

B. 1, 3

C. 2, 3

D. 2, 5

I will gladly give a BRAINLIEST for a CORRECT, EXPLAINED answer!!

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.