SEP Develop a Model The element argon (Ar) has eight valence electrons and is a liquid at very low temperatures. Sketch a model of two argon

atoms and where each atom's electrons need to be in order for an attractive

dispersion force to occur. Make a similar sketch that explains why larger

molecules typically experience larger dispersion forces.

1 States of Matter

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Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?