How can you tell if a chemical change has occurred?

The coloured gas is

Adding hydrogen ions to a solution will makes the solution more

It is a blistering hot day beach you look your portable thermometer which says it is 35 c what is the temperature in Fahrenheit and kevin

The chemical formula of lead sulfide tells you that it contains

In transition metals why is sometimes the d and not f orbital used

What scientists do that is the basis for there investigation

A reaction is zero order in a reactant. Which best describes what happens to the rate if the concentration of that reactant is cut in half? a: The rate changes to twice the original rate. b: The rate changes to one-half the original rate.

How many moles of hydrogen atoms are there in 1 mole of C6H12O6 molecules?

Which condition will release more energy when an electron changes levels? From n = 4 to n = 3 from n = 3 to n = 2 from n = 2 to n = 1

What happens when an electron moves from a higher energy level to a lower one