C2H6 + O2 + CO2 + H20 How many moles of CO2 are produced during the complete combustion of 4.6 moles of C2H6?
O 1.8 moles
O 4.4 moles
O 7.2 moles
O 9.2 moles

Iknow the answer is a but i don't know why

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals