A.- ¿En qué consiste ajustar una ecuación química?b.- Escriba los 2 métodos para ajustar la ecuación química y en qué consiste cada uno de ellos c.- Balancear las siguientes reacciones por el método de tanteo
C3 H8 + O2 CO2 + H2 O
Na2 CO3 + HCl NaCl + CO2 + H2 O
PBr3 + H2 O HBr + H3 PO3
CaO + C CaC2 + CO
H2 SO4 + BaCl2 BaSO4 + HCl

What happens to the light rays when they hit the specimen?

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.