NaimExplain

Explain the difference between a physical and chemical change. Physical change substance can be changed back to it original form. Chemical change substance cannot be changes back to its original form.

Equations are often used written in symbols in chemistry. Carbon (C) and oxygen (O​) can join together to make carbon dioxide. How would you express this as a symbol 2​ equation? C + O​2​> CO​2

Law of Conservation of Mass Mass is not created nor destroyed during an ordinary chemical reaction. (CH4 + 2O2 = CO2 + H2O (Mass Reactants equal Mass Products)) Exceptions include Nuclear Reactions (E =mc^2). Law of Conservation of Energy Energy in the universe is conserved but changes form. Law of Multiple Proportions Two different elements can form more than one compound (NO, NO2, N2O2). Law of Definite Composition Using the atomic mass on the Periodic Table, the ratio of Mg to O is 24:16. No matter how much of the compound you have, the ratio will always be 24:16.

Law of Conservation of Mass Mass is not created nor destroyed during an ordinary chemical reaction. (CH4 + 2O2 = CO2 + H2O (Mass Reactants equal Mass Products)) Exceptions include Nuclear Reactions (E =mc^2)