ANSWER ANY THAT YOU CAN THANK YOU SO MUCH! 14. A chemist wants to make Co(OH)2 according to the following reaction: CoCl2 (aq) + 2NaOH (aq) → Co(OH)2 (s) + 2NaCl (aq) If the student uses 167.4 mL of a 1.39 M solution of NaOH and an excess of CoCl2, how many grams of Co(OH)2 will be formed?

15. A chemist wants to make 150.0 grams of BaCO3 using the following reaction: Ba(NO3)2 (aq) + K2CO3 (aq) → BaCO3 (s) + 2KNO3 (aq) If she has an excess of K2CO3, what volume of a 2.56 M solution of Ba(NO3)2 will she need to use?

16. Of the two concentration units you learned in this chapter, which is more like a ratio of the amount of solute to the amount of solvent?

17. You make a solution by mixing 67.8 grams of KCl with 450.0 grams of water. What is the molality of the solution?

18. A chemist makes a 2.34 m solution by mixing 23.1 g of MgCl2 with water. How many kilograms of water were used?

it is important to conserve water because there is very limited amount of freshwater here on earth and if we are not smart about how we use it we will only be runnning out of our supply faster than neccessarry.

the answer is a. co2, this would be colder than the : )

explanation:

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.