Answer:
Mass is the amount of matter in an object.
Weight is how much an object weighs.
Hope this helps!
Rotting vegetables is a chemical change I think.
It changes state
Meaning, it goes from solid to liquid, making it change its state. Hope this helped.
Reaction of Elemental Calcium with Water is as follow,
Ca + 2 H₂O → Ca(OH)₂ + H₂↑
When Sodium Metal is reacted with Water it produces NaOH and eliminates Hydrogen gas as shown in following equation,
2 Na + 2 H₂O → 2 NaOH + H₂↑
In both cases corresponding Hydroxides along with Hydrogen gas is produced.
