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There are six children playing on a playground. Each child has two keychains. What is the ratio of children to keychains?
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In the following reaction, how many liters of carbon dioxide, CO2, measured at STP, would be produced from the decomposition of
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A helium balloon contains 0.26 g of helium. How many moles of helium does it contain?
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Answers (3)
yhgygy
350
1.70
