Directions: Identify each chemical equation as a synthesis, decomposition, single-displacementor, or double displacement reaction.
a. Synthesis b. Decomposition c. Single Displacementor
d. Double Displacement
9.2H2O(→ 2H2(9 +0f9
10.0129 +2KBr(aq) + 2KBr(aq) + Bry()
11. CaO3 + H2O() - Ca(OH)() (
12. HCl(aq) + NaOH(aq) → NaCl(aq) + H2O()
+

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.

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added