Cecil writes the equation for the reaction of hydrogen and oxygen below.

H2 + O2 → H2O

Why does his teacher ask him to balance the equation by including the correct coefficients?

to show that most molecules exist in pairs
to show that most compounds exist in pairs
to show that atoms are conserved in chemical reactions
to show that atoms are created in chemical reactions

Little Billy lay down in his racecar-shaped bed and tried to sleep. Suddenly, the shutters of his window began to rattle and the knob of his bedroom door started twitching. Billy sat up. The door flew open and the ghost of the house's previous owner floated in, his clothing in rags, his face covered in scars, his shoulders hunched from the many chains draped over his torso. "I must have vengeance!" the ghost declared. "Well, go have vengeance somewhere else tonight," said Billy, as he sighed. "I have school tomorrow." He plopped back down, covered up, and went to sleep. Which statement best explains how the plot of the story helps develop the main character? What does this quote mean Arrange the elements in order of increasing ionization energy. Use theperiodic table to identify their positions on the table.Drag each tile to the correct box.HolaTileschlorinefluorinegalliumphosphorusSequence They plural plural feminine in Spanish Why is defending rights important Help me plzzz i need help. Andrew Filled a measuring cup with 7/8 of a cup of olive oil then he poured 1/2 of a cup of the oil into a bowl. How much oil is left in the measuring cup y = 4x + 12What is the x - intercept? 'How did the Magna Carta impact political institutions?it gave equal rights to all citizensit outlined the powers of the churchit established limited governmentit required citizens to pay taxes What value of x makes the following equation true?15+3x=3(22x) Substitute to solve Brainliest for correct answer attached screenshot below What is the solution to this inequality?4x + 2 5 -14 or 3x-5 > 16OA.X3-4 or x>7OB.-45x8OD.x=-4 From a room temperature of 42 degrees, the temperature dropped by 20 degrees, then rose by 75 degrees and finally dropped by 1 degree. What is the temperature after the given changes? what is the molecular geometry of c atom in ch3nh2 HELP! time crunch!"Describe the flow of blood through the human heart starting in the left atrium and ending in the left atrium."in two or three sentences please...Thanks in advance!Willing to give 40 points! 50 POINTS PLEASE HELPStephano solved this inequality, but the solution does not work when he checked his answer. In which step did he go wrong? Explain.-4s + 5 16\frac{-4s + 5}{-4} \frac{16}{-4}s + 5 - 5 -4 - 5s -9 (9x2 8) + (9x2 + 9x + 3) El padre de mi hermanastra es mi ________.i need the answer Circle the incorrect pronoun shift. Rewrite the sentence correctly. My friends and I went to the museum where they saw the modern art exhibit.