Use the Gizmo to mix 200 g of copper at 100 °C with 1,000 g of water at 20 °C. A. What is the final temperature? B. Calculate the temperature change of each substance by subtracting the initial temperature from the final temperature. ∆T water: ∆T copper: C. How much heat energy (q) did the water gain? D. Now solve for the specific heat (c) of copper:

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive