What is always conserved in a chemical reaction?

a. mass is always conserved in a reaction.
b. energy is always conserved in a reaction.
c. mass and energy are both conserved.
d. nothing is always conserved in a reaction.

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Connect the whole numbers on the periodic table to indicate what they represent?