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Molar mass is the mass of one mole of a substance in grams. *The unit of molar mass is grams per mole (g mol-1). Molar mass of a substance is numerically equal to its relative atomic mass/ relative molecular mass/ relative formula mass. Molar mass of atomic substance: Molar mass of molecular substance: […]
What is the molar mass of Sodium, Water & Sodium Chloride? [Relative atomic mass: H = 1; O = 16; Na = 23; Cl = 35.5] Answer: Molar mass of Sodium = Relative atomic mass of Na = 23 g mol-1 Molar mass of Water = Relative molecular mass of H2O = 1 + […]
Empirical formula is a chemical formula that shows the simplest ratio of atoms of each element present in a compound. Molecular formula is a chemical formula that shows the actual number of atoms of each element present in one molecule of a compound. The empirical formula of an ionic compound is similar to its […]
Step 1: Find the mass of each element. Step 2: Calculate the number of moles of each element. Step 3: Find the “mole ratio”. Step 4: Find the simplest “mole ratio”.
A chemical equation is a symbolic representation of a chemical reaction. A chemical reaction is a process where one or more substances (reactants) changes into one or more new substances (products). In other words, reactants undergo a chemical change & transform into products in the end of the chemical reaction. In a chemical equation, reactants […]
This video gives you a general idea on what chemistry is about. This video gives a general explanation on what is matter & how does energy affects the changes in the states of matter. Note: SPM chemistry syllabus only focus on the 3 states of matter: solid, liquid & gas. The 4th state of […]
This video explains the characteristics of the 3 states of matter: solid, liquid & gas. It also explains 2 types of mixtures: homogeneous mixtures & heterogeneous mixtures. This video gives a general explanation on what is an atom. This video explains the differences between elements & compounds. This video explains the differences […]
This video gives detail explanation on the 3 subatomic particles of an atom: protons, neutrons & electrons. This video gives an introduction on what is an atom, explains the 3 subatomic particles of an atom: protons, neutrons & electrons, and shows how atoms bond to form molecules. This video explains the atomic number […]
This video explains the mole concept. This video shows you how to calculate the empirical formula of a compound. These videos (Part 1 & 2) show you how to name & write the chemical formulae of ionic compounds. These videos (Part 1 & 2) show you step-by-step how to write the chemical […]
