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- Ashley P., Teacher
- Prince Rupert, BC, Canada
Molar Mass Teacher Resources
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All units and significant figures should be used correctly as part of this check on molar mass calculations. These word problems range in complexity and present the missing variable in different ways. Your young scientists might enjoy this different approach to chemistry calculations.
Sal continues his explanation of The Ideal Gas Equation in this chemistry video. He sets up a different problem from the previous video, and uses the ideal gas equation to calculate the molar mass of a 98 ml container that contains .081 grams of a substance at standard pressure and temperature.
Only three slides comprise this collection. The first defines molecular weight and molar mass. The second lists the molar mass and number of particles in a mole of several substances. The third is a chart depicting a chemical reaction both graphically and with chemical equations. Together, they make a nice, neat presentation that you can use to prepare beginning chemists to start learning about stoichiometry.
Students develop an understanding of the mole and molar masses of elements. In this mole lesson plan, students use beans to find their relative masses and draw parallels to the atomic masses of elements. Students work in teams and each student finds the relative mass of one type of bean. Students compare their data and answer 5 questions. They then calculate the relative masses of elements and answer 5 questions.
For this extracting oxygen from moon rocks worksheet, learners read about the need for oxygen for lunar colonists. Students solve 2 problems about the lunar mineral ilmenite which contains oxygen and other elements. They find the molar mass of ilmenite, the molar mass of hydrogen gas, iron and titanium dioxide. They determine how much water would be produced from 1 kg of ilmenite.
In this molecules, moles and molar masses activity, students find the atomic masses of 8 elements, they write the formulas for 6 diagrams of molecules and they find the molecular masses of 12 compounds. Students also find the fraction of atoms in compounds and determine the percent composition of each.
Students determine the molar mass of a gas. In this molar mass of a gas lesson plan, students use the vapor density of an organic solvent to determine its molar mass. They vaporize the solvent and collect the vapor. Once it is cooled they can mass the vapor and use the universal gas equation to find the molar mass.
This is an interesting selection of information about the freezing temperature of nitrobenzene and a comparable related mixture. Data is provided for your class to use to simulate the experiment and to plot a graph. Questions are then asked about the cooling graph and the solution. Pupils should be able to calculate the concentration, molarity, and molar mass of the constituents.