1 . A reaction has the stoichiometric equationA+B=2R. What is the order of reaction? 2. A reaction with stoichiometric equationhas the following rate expressionWhat is the rate expression for this reaction if thestoichiometric equation is written as A+2B=2R+S?A B R S2

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1 作直线运动的物体，其运动方程为: ，式中x的单位为m，t 的单位 为s，速度单位为m·s

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