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1. If the volume of the cylinder is 5500 mL and the pressure of the N2 in it is 2.5 atm. (temperature is 25oC) a. How many moles of nitrogen molecules are in the cylinder? b. How many grams of nitrogen are in the cylinder? 2. For the following reaction: Mg(s) + 2HCl (aq) ? MgCl2 (aq) + H2 (g) At 25oC and 1atm, 0.0350 g of Mg reacted with excess amount of HCl. a. How many moles of H2 will be produced? b. How many mL of H2 will be collected (assume hydrogen is an ideal gas)?

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