Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below. 2 NaClO3 --> 2NaCl +302 How many grams of NaClO3 were needed to produce 3 grams of O2? Round your answer to the nearest whole number. Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0 Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect: Molar Element Mass Sodium 23 Chlorine 35.5 Copper 63.5 Oxygen 16​