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How many moles of water does a raindrop. A compound is made when atoms of different elements join together by chemical bonds. Show all your work when solving the following problems. Show all your work when solving the following problems. Find the empirical formula of a compound containing 32 g of bromine and 4 g of magnesium.

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If such a penny has a mass of 3.3 g, how many moles of copper atoms would be in one penny? Web helium atoms do not join up with each other or any other element and it is a gas. 4 g 1 mole = 0 mole mg mgbr 2 24 g 4.42 g / 55.8 g =.0792 moles.

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