Which one of these reactants are soluble or insoluble? And how you know if they are soluble or insoluble? Explain. I used my solubility table to answer this question, but I am still not sure if it's even correct. Cu + Pb(NO3)2
Cu + Zn(NO3)2
Pb + CuSO4
Pb + Zn(NO3)2
Zn + CuSO4
Zn + Pb(NO3)2

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

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.)

What is the subscript for oxygen in its molecular formula