Determine the molarity of each of the following solutions. 0.454 g of H2SO4 in 1.00 L of solution

20.90 g of Al(NO3)3 in 1563 mL of solution

2.70 kg of CuSO4 · 7 H2O in 309 L of solution

0.005707 mol of Cl2 in 10.60 mL of solution

Which part of a feedback mechanism is able to monitor the conditions outside of cells and usually uses nerve cells to relay this information to an intergrating center

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

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.)