The initial concentration of a reactant in a first order reaction is 0.620 M. What will be its con- centration after 3 half-lives? *

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To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %

An unknown insoluble substance displaced the water shown. it's mass is indicated on the triple beam balance. mass = a. 694 b. 693.5 c. 693.0 d.693.8