Which statement describes how a basic coffee cup calorimeter works? It measures the mass of a substance given the specific heat and temperature of water in a cup of known size. It measures the density of a substance given the mass, specific heat, and temperature of water in a cup of known size. It uses the mass and specific heat of water along with a pressure gauge to measure the gain or loss of energy when a substance is added. It uses the mass and specific heat of water along with a thermometer to measure the gain or loss of energy when a substance is added.

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

13. calculate the initial concentration (before precipitation) of carbonate ions after the addition of each 0.05 ml of solution b to the 1.00 l beaker of solution a. divide the work among group members and write the answers in the table in model 3. assume the volume change as solution b is added is negligible. 14. notice the initial concentrations of zn2+ - and cu2+ in the table in model 3. a. explain how these were obtained from the data in model 2. b. as solution b is added and precipitates form, do these initial concentrations change? 15. use the data in model 2 to indicate the presence of precipitate (either znco3 or cuco3) after each 0.05 ml addition of solution b in model 3. 16. use the initial concentrations of carbonate ions and zinc ions to calculate the reaction quotient, qsp for the zinc carbonate scenarios in model 3. divide the work among group members and write the answers in the table in model 3. 17. use the initial concentrations of carbonate ion and copper(ii) ions to calculate the qsp for the copper(ii) carbonate scenarios in model 3. divide the work among group members and write the answers in the table in model 3.