Consider the following reaction: 4Na (s) + O2 (g) --> 2Na2O (s) How many grams of O2 are needed in a reaction that produced 75.0 g of Na2O? 16.5 g of O2 18.8 g of O2 20.5 g of O2 17.8 g of O2 19.4 g of O2 A heating curve illustrates ______. what happens to the particles of a substance as it is heated what happens to the heat applied as the temperature is increased the changes in the temperature and physical state of a substance as it is heated what a substance looks like as it is heated the chemical changes that occur as the substance is heated
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The molar mass of Na2O is: (2 * 22.99 g/mol for Na) + (1 * 16.00 g/mol for O) = 45.98 g/mol for Na2O The molar mass of O2 is: 2 * 16.00 g/mol for O = 32.00 g/mol for O2 Now, we need to find the moles of Na2O produced: 75.0 g of Na2O * (1 mol of Na2O / 45.98 g Show more…
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