Answer:
Adding Catalyst can Speed up a Chemical reaction
Answer:
Would it be<em><u> 7.69 seconds</u></em>?
Explanation:
Answer:
open system
Coffee held in a cup is an open system because it can exchange matter water vapors and energy heat with the surroundings.
An element is a pure substance made up of only one kind of atom. An element is composed of atoms in which it is composed of neutrons and protons. The nucleus is surrounded by electrons. The answer to this problem is A. element
