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How many formula units make up 21.2g of magnesium chloride Mg Cl 2?
Updated: 4/28/2022
Wiki User
∙ 11y agoBest Answer
The gram formula unit mass of magnesium chloride is 95.21. Therefore, 21.2g of magnesium chloride make up 21.2/95.21 or 0.223 formula units, to the justified number of significant digits.
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∙ 11y agoThis answer is:
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How do ypu determind the mass of a mole of a compound?
Step 1: observe the formula for that compound. Count up the number of elements in the formula of each component element. Step 2: look at the periodic table. Multiply the elements' atomic masses by the number of them in the formula. Step 3: add it all up. That's the mass of 1 mole of that compound. It's called the compound's "molar mass" and the correct unit is grams per mole (g/mol). Example: K3PO4 (potassium phosphate). 3 potassiums at 39 each, 1 phosphorus at 31, and 4 oxygens at 16 each = 212g/mol.
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