Answer: I did the research myself since I couldn’t find the answers.
Physical change:
Wax melting from applied heat
Grinding wheat to make flour
Adding copper with gold to make jewelry
Chemical Reaction:
Growth of a seed into a seedling
Making caramel by burning sugar
Tarnishing of silver
Explanation:
Thanks google
The mass of oxygen and hydrogen must be equal to the mass of the substance they create the water. So if the hydrogen is 2.8 g the oxygen must account for the rest of the mass. Basically just subtract 25.4-2.8=mass of oxygen
The ratio of the displacement (change in position) of an object divided by the time interval during which the displacement occurred. Velocity is a vector, having both magnitude and direction. Units: m/s (SI), cm/s (cgs), ft/s (U.S. customary system). See instantaneous velocity.
