ATOMIC WEIGHTS\" 1. Fill in the table below. This will represent the \"periodic

Question

ATOMIC WEIGHTS" 1. Fill in the table below. This will represent the "periodic table" for safety pins. You are using numbers substantially different than those on the real periodic table of the elements, but the ideas are analogous. You need to find the "atomic weight" of each safety pin, which is the mass in grams of 12 pins. For each of the five types of safety pins, weigh and record the mass of 12 pins Safety pin size/color 27 mm/Nickel 38 mm/Nickel 51mm/Nickel 38 mm/Brass 51 mm/Brass Atom 16 a Mg 1:50 Cl 8.16 Calculate the weight of one dozen MgCl, "molecules" made from safety pins. Do this the same way you would ordinarily calculate the molecular weight: add up the weights of the individual atoms according to the formula (one dozen Mg plus two dozen CI). This will be your "predicted weight" of one dozen MgCl, molecules. 2. Predicted weight of one dozen MgCl2 moleculesg 6.55 133 Limiting Reactant and Theoretical Yield: Report Form

Explanation / Answer

Molar mass of MgCl2 = 1 mole of Mg + 2 mole of Cl = 1 mole * 24.31 g/mole + 2 mole * 35.45 g/ mole = 95.21 g

Here weight of one dozens of  MgCl2 =  1 * weight of Mg in terms of pins + 2 * weight of Cl in terms of pins

Therefore, weight of one dozens of  MgCl2 = 1*6.55 g + 2*9.48 g = 25.51 g

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