Dichloromethane, CH2Cl2 is used to decaffeinate coffee beans and is prepared by reacting methane (CH4) with 2 moles of chlorine. a second product, hydrogen chloride, is also formed during this reaction. first write a balance equation for the formation of dichloromethane. next calculate how many gramsof chlorine are needed to react with 100.0 grams of methane. finally, calculate how many grams of dichloromethane are formed from 100.0 grams of methane, if present yield for the reaction is 80%.