4.Both xenon (Xe) and argon (Ar) are monoatomic noble gases. Watson predicts that Xe is a liquid and Ar is a gas at atmospheric pressure and a temperature of 120 K. Crick states that both should be gases. Upon reviewing the literature, it turns out that Watson is correct. Explain why Watson is correct and propose the principles that Crick was using to make his prediction.

What is the correct term for living the most sustainable life you can within your current circumstances?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.