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Unit 7 Worksheet #1 Solve the following problems. Make sure to show work and write answers with correct significant figures. Box your final answer. 1. What is the mass of 182 L of carbon dioxide gas at STP? 2. How many molecules are in 45.6 g of butane? 3. How many grams are in 2.13 moles of zinc phosphate? 4. What is the volume of 21.4 g of He gas at STP? 5. What is the mass of 9230 cm3 of carbon monoxide gas at STP? 6. How many grams are in 8.52 x 1023 formula units of calcium chloride?