Relative Atomic Mass Calculations Isotopes?are different atoms of the?same?element?that contain the?same number of protons?and electrons but a?different number of neutrons These are atoms of the sa...
Atoms: Key Terms The?atomic number?(or?proton number) is the number of protons in the nucleus of an atom and has the?symbol?Z The atomic number is also equal to the number of electrons that are pre...
Mass & Charge Distribution The mass of an atom is?concentrated?in the nucleus, because the nucleus contains the heaviest subatomic particles (the neutrons and protons) The mass of the electron ...
Titrations Volumetric analysis?is a process that uses the volume and concentration of one chemical reactant (a standard solution) to determine the concentration of another unknown solution The tech...
隨著留學申請人數的不斷增加，競爭也愈發激烈，留學早已陷入內卷不停的怪圈之中，而標化考試絕對算得上是內卷重災區。在疫情爆發的這兩年，許多美國大學對標化的要求從“必須提交”改成“test-optional可選”或是“tes...
Concentration Calculations Step by step Concentration calculations involve bringing together the skills and knowledge you have acquired previously and applying them to problem solving You should be...
Concentrations of Solutions Standard solutions Chemists routinely prepare solutions needed for analysis, whose concentrations are known precisely These solutions are termed?standard solutions They ...
Real Gas Behaviour The?ideal gas equation?does not fit all measurements and observations taken at all conditions with real gases The relationship between pressure, volume and temperature shows sign...
Gas Law Relationships Gases?in a container exert a?pressure?as the gas molecules are constantly?colliding?with the walls of the container Gas particles exert a pressure by constantly colliding with...
Ideal Gas Equation Kinetic theory of gases The kinetic theory of gases?states that molecules in gases are constantly moving The theory makes the following assumptions: The gas molecules are moving ...
Avogadro's Law Volumes of gases In 1811 the Italian scientist Amedeo?Avogadro?developed a theory about the volume of gases Avogadro’s law?(also called?Avogadro’s hypothesis)?enables the mole ratio ...
Reaction Yields Percentage yield In a lot of reactions, not all reactants react to form products which can be due to several factors: Other reactions take place simultaneously The reaction does not...
