Acetylene (C,H, gas is often used in welding torches because of the very high heat produced when it reacts with oxygen (0,) gas, producing carbon dioxide gas and water vapor. Calculate the moles of acetylene needed to produce 0.050 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits. olo

This is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive MTBE): CH;OC(CH,), A chemical engineer has determined by measurements that there are 93.9 moles of hydrogen in a sample of methyl tert-butyl ether. How many moles of oxygen are in the sample? Be sure your answer has the correct number of significant digits. Omol ?

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12 Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid water and carbon dioxide gas form aqueous glucose (C6H₁2O6) and oxygen (0₂) gas. Calculate the moles of glucose produced by the reaction of 0.070 mol of carbon dioxide. Be sure your answer has unit symbol, if necessary, and round it to 2 significant digits.

Gaseous methane (CH reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) and gaseous water (H,0). : If 1.01 g of carbon dioxide is produced from the reaction of 1.1 g of methane and 2.4 g of oxygen gas, calculate the percent yield of carbon dioxide. Be sure your answer has the correct number of significant digits in it.