It also has tools for teachers and students to create their own. This drag-and-drop periodic table environment from Chicago’s Museum of Science and Industry lets you experiment with different element combinations.īrowse “showcase” chemistry simulations, with many more available in the library. Give students titration practice virtually. Nearly two dozen simulations cover topics like average atomic mass, solubility with rock candy, and freezing point depression with road salt. “Interview” suspects by viewing videos, investigate the crime scene using images, and analyze evidence from the crime lab.Įxplore the chemistry of aspirin virtually with four levels of experiments, including synthesis, thin layer chromatography, and reaction conditions. This ChemCollective activity could be described as a murder mystery for chemistry students. The ChemCollective, organized by a group from Carnegie Mellon, shares virtual labs, simulations, and molecular level visualizations for chemistry (See “Resources by type” in site’s sidebar.) The Multimedia Educational Resource for Learning and Online Teaching (MERLOT) at the California State University has collected descriptions and links to a huge number of chemistry simulations, with peer review ratings and comments, and information on appropriate grade levels. MERLOT Materials: Chemistry Simulations.PhET, based at the University of Colorado at Boulder, offers over four dozen chemistry-based simulations, many translated into different languages. Users can copy any of the Google Forms to their Google Drive to edit and use. ACS Middle School Chemistry: Remote Learning AssignmentsĮach assignment contains videos, images, and questions keyed to the ACS Middle School curriculum.Every simulation is open for teachers and students to access. Several new simulations are added each year. To determine the number of atoms in 1 g of the element, students should remember to multiply the value by 2.This page is a collection of all the simulations created by the American Association of Chemistry Teachers. This is because in both cases, 1 molecule is made of 2 atoms. Hence, for these 2 elements, students should multiply the number of particles (which is molecules) by 2 to determine the number of atoms. Here, one of the elements, iron, is made of atoms, while the other two, iodine and oxygen, are made of molecules. In this video, we will focus on determining the number of atoms in 3 different elements of the same mass. Hence, we can safely say that, to determine the number of particles, we can use this formula: number of particles = number of moles x 6 x 10 23 In this Video Since 1 mole of substance contains 6 x 10 23 particles, 2 moles of substance contains 2 x 6 x 10 23 particles.0.5 moles of substance contains 0.5 x 6 x 10 23 particles. Formula: number of particles = number of moles x 6 x 10 23 The value 6 x 10 23 is called Avogadro’s constant or Avogadro’s number.Įqual number of moles of substances contain the same number of particles. In 1 mol of hydrogen gas, 6 x 10 23 molecules have 2 x 6 x 10 23 hydrogen atoms. This is because 1 hydrogen molecule has 2 atoms. To determine its number of atoms, we need to multiply the number of molecules by 2. If we focus on hydrogen gas, then 1 mol of hydrogen gas has 6 x 10 23 hydrogen molecules. The particles can be atoms, molecules, ions or even electrons, depending on what substance we are referring to.įor example, if we focus on helium, then we are talking about helium atoms. One mole of a substance has 6 x 10 23 particles. Hence, chemist use a unit – mole – to count particles. There are so many of them it is pretty impossible to count them. Also, they must be confident with calculating the number of particles from the number of moles of particles and vice versa. Iodine (I 2) iron (Fe) oxygen (O 2) Syllabus ObjectivesĪt O levels, students must be able to perform calculations involving the number of moles, mass and molar mass of a substance. Which substance contains the greatest number of atoms in 1 g?
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