For the decomposition of nitrous oxide at 565 °C 2 N2O → 2 N2 + O2 the following data have been obtained: [N2O], M 2.36 1.20 0.808 0.607 Time, s 0 6.17 12.30 18.50 What is the average rate of disappearance of N2O over the time period from t = 6.17 s to t = 12.30 s (For the answer, just enter the numerical value, 3 sig digs)

Your roll: experienced electron speech is adressed to: a new "freshman class" of electrons job: write a speech task: you are to pretend that you are giving a speech to a new group of electrons. be sure to mention their placement in an atom, their charge, and their role in chemical bonding (ionic and covalent) be specific!

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.