Which is not a sign that a double displacement reaction has occurred?

question 15 options:

gas may be formed

water may be produced

a precipitate is formed

the coefficients are equal

Which statement describes james chadwick’s discovery.

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j