A. Write an expression for the rate of change of [H].b. Write an expression for the rate of change of [Br].c. Since the hydrogen and bromine atoms are short-lived species, we canapply the steady state approximation and set the rates from parts a and bto zero. Express the steady-state concentrations of [H] and [Br] in terms ofthe concentrations of H2,Br2, HBr, and M. (Hint: try adding the rate forpart a to that for part b.)

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.