How would you convert Atoms to Kilograms? Then use the molecular weight of the element to convert the number of moles to the mass in grams. Physical & Astronomical Constants. Pdf File Upload In Joomla Download. Here is a list of useful constants. 1 Lunar Mass = 7.3477x10 25 gram = 7.3477x10 22 kg (Proton Mass)/(Electron Mass) = 1836.15.

Write on a piece of paper the name of an element that interests you and the number of atoms of that element you wish to convert to grams. For example, you write 'Seven atoms of lithium.' Find the element that interests you in an online periodic table (see Resources) or any chemistry textbook. For example, you find the element lithium (Li) in the first column of the periodic table, second from the top. Read the number under the symbol for lithium. For example, you read 6.941.

Divide the number under the symbol of the element by 6.022 x 10^23 using a scientific calculator. For example, 6.941/(6.022 x 10^23) = 1.152 x 10^-23. Multiply your answer times the number of atoms you wrote on the piece of paper. For example, (1.152 x 10^-23) x 7 = 8.068 x 10^-23. Seven atoms of lithium weigh approximately 8.07 x 10^-23 grams.

Tutorial – Converting GRAMS to MOLES to ATOMS or MOLECULES Using the grid & bridge concepts ( Std 3 in Ch 8) bridge 1 bridge 2 bridge 3 milligrams grams moles atoms or molecules Bridges are fractions that equal 1. They allow us to change one unit of measure to another, like crossing a bridge over a river from one side to the other. Notice that each bridge can go in two directions, just like a real bridge over a river. For a bridge to work, the top and bottom of the fraction must equal each other. That is why the value of all bridges = 1. The following equivalent equations will be made into bridges (fractions that = 1) to do go back and forth from one unit of measure to another: bridge type 1 (3 kinds) 1000 milligrams = 1 gram 1000 grams = 1 kg 1.0 x 10 6 mg (microgram) = 1 gram bridge type 2 1 molar mass in grams (or gram molecular wt if we are using elements) = 1 mole bridge type 3 6.022 x 10 23 atoms (or molecules) = 1 mole (remember Avogadro 10 Easy Lessons Blues Harmonica Rapidshare Free. !!!

) Your job is to create fractions that will take you the way you need to go. The example will use both the bridge concept and conversion grids. Here’s the example: Example 1 You are given 850 mg of Ca and asked to find out how many atoms that represents. Each bridge is made as follows: Solution – Ex 1 bridge 1 1000 mg = 1 g bridge 2 40.1 g Ca = 1 mole Ca bridge 3 1 mole = 6.02 x 10 23 atoms We make each fraction from the bridge that takes us from one unit of measure to another. The side of the fraction that goes on top, is the one with unit of measure we are changing to.