Data in picture 1. First Calculate the heat gained by the water: must show all your work

Examine the result: Is the change positive or negative? Is it endothermic or exothermic? Did the water gain energy or lose energy?

2. Next calculate the heat lost by the cadmium metal: You must show all your work.

Examine the result: Is the change positive or negative? Is it endothermic or exothermic? Did the cadmium gain energy or lose energy?

3. Now, calculate the specific heat of cadmium: You must show all your work.

Lewis structure and molecular geometry for nh2cl

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

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.)