The following reaction was monitored as a function of time: AB→A+B A plot of 1/[AB] versus time yields a straight line with slope 5.8×10−2 (M⋅s)−1 .What is the value of the rate constant (k) for this reaction at this temperature?What is the half-life when the initial concentration is 0.55 M?If the initial concentration of AB is 0.220 M , and the reaction mixture initially contains no products, what are the concentrations of A and B after 70 s ?

What are the percent by mass of copper in penny lab

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

What does the field of thermodynamics relate to a-changes in nuclear reactions b- changes in energy in systems c changes in molecular structure d changes in atomic properties