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【单选题】In chemical reaction,2CO (g) + O 2 (g) → 2CO 2 (g),which is product?
A.
CO
B.
O 2
C.
CO 2
D.
A+B
【简答题】A chemical reaction is a process that always results in the conversion of reactants into product or products. The substance or substances initially involved in a chemical reaction are called reactants...
【单选题】In chemical reaction,2CO (g) + O 2 (g)→ 2CO 2 (g),which is reactant ?
A.
CO
B.
O 2
C.
CO 2
D.
A+B
【简答题】The substancesthat undergo changes in chemical reaction are called the ,and the new substancesformed are the .
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