As the liquid cools down, the amount of potential energy is reduced and the molecules start to move slower.
Chemical Change: The chemical change is when it combusts due to the dry and hot conditions because combustion is an irreversable effect and combustion makes 2 or more new products
Physical Change: The physical change is when the gum loses the water within this is easily reversible by soaking it in water or rechewing the gum.
Coffee is a homogenous mixture but could also be classified as a solution because it is made up of solutes and a solvent
Cookiedough is a heterogenous mixture because it is not completely uniform
during a chemical reaction, the total mass of the products must be equal to the total mass of the reactants.
Why things work based on evidence not absolute rules that the natural world follows
the ratio should be 2hydrogen and 1 oxygen and the formula should be dihydrogen oxide
this would be a pure substance because it is made up of two elements with no contamination it is simply H2O2
both expelling and absorbing energy combustion and color change if it involves making something new
Noble gasses: Noble gasses react with nothing they're are the most stable out of anything in the periodic table
Alkiline metals: Alkiline metals are deadly and extremely reactive and or explosive they all react with water and some even with air
increasing the concentration of a reactant in solution, increasing the surface area of a solid reactant, and increasing the temperature of the reaction system
Combustible, Oxidizing Material and Biohazardous
it could be a number of things ex both copper(Cu) or silver(Ag)
Tin because its atomic number is 50 equal to its number of protons
combustibility heat being released and finally a new substance is made in the form of gas this reaction was definitly an endothermic reaction
The particle (or kinetic) theory of matter can be summarised as: All matter is formed of tiny particles. The particles are constantly randomly moving about. The particles can be arranged regularly or randomly. The particles are held together by weak or strong forces.
WHIMIS symbols
Colloid particles resist settling rapidly to the bottom of a vessel due to Brownian motion. Emulsions are an example of colloids composed of tiny particles suspended in another immiscible (unmixable) material. An emulsion is a suspension of two liquids that usually do not mix together.
a compound or substance that acts as a stabilizer for emulsions, preventing liquids that ordinarily don't mix from separating. ex. milk being an emulsulsion for fat and water
The Tyndall effect is light scattering by particles in a colloid such as a very fine suspension. Also known as Tyndall scattering
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.
Chemical properties describe the characteristic ability of a substance to react to form new substances; they include its flammability and susceptibility to corrosion
chemical decomposition produced by passing an electric current through a liquid or solution containing ions.
Dalton's atomic theory suggested that all matter was comprised of indivisible and indestructible atoms with distinct masses and properties
J.J. Thompson discovered the electron
Rutherford
J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons.
Halogens are any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table.
Alkili Metals are any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table. They are very reactive,
Metals: Most metals have a shiny metallic luster and reflective surface. and conduct electricity Nonmetals: Nonmetals are generally dull or nonreflective and do not have a metallic luster. and don't conduct electricity Metalloids: Metalloids can have a metallic or nonmetallic appearance, and can have properties of either or sometimes even both depending on the element.
the mass number or atomic number is the total number of protons and neutrons in the neucleus of the atom
In chemistry, the molar mass (M) of a chemical compound is defined as the ratio between the mass and the amount of substance
multiplying the atomic mass in amu by the molar mass constant (1 g/mol). is how you get your molar mass
Groups: The vertical column of the periodic table that signifies the number of valence electrons in an element. Periods: The horizontal rows in the periodic table that signify the number of electron shells in an element. Families: Elements that have the same number of valence electrons and therefore similar properties.
NACL Carbonate Clo
Water (H20) as well as carbon dioxide (CO2)
(Cu[III]F) (BrF)
The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
C3H8 + 5 O2 = 3 CO2 + 4 H2O
Fe2O3 + 3CO = 2Fe + 3 CO2
Exothermic is a reaction in which releases energy making heat
Endothermic is a reaction in which absorbes energy therefor making the surrounding area cold
catalysts are substances that increase the rate of a chemical reaction without itself undergoing any permanent chemical change.
An inhibitor is a substance that slows down a chemical or corrosion reaction.
proteins can react as a catalyst increasing the rate of virtually all the chemical reactions within cells.
by using an inhibitor such as oil applying a coat of paint or other similar things
Carbon dioxide(CO2) and water (H20)