You are a scientist exploring the surface of a new planet. you find a new substance that you do not recognize. as you attempt to identify this substance you notice that it is very spreads out to form the shape of the container you keep it in. the surface of the substance becomes very flat and smooth. what state of matter is the new substance in? a solid b liquid c gas d plasma

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.)