A chemical discharge from the Adidas factories along the Pearl River in China causes a total damage worth of $50 million in 25 years. Imagine, the Chinese government decides to demand that damage cost this year (2020) from the International sports garment companies through a tax policy. However, Environmental Ministry uses a discount factor of 1 and comes up with a Net Present Value while the Commerce Ministry uses a 10% discount rate and comes up with another Net Present Value of the damage cost. a) Calculate both the NPVs and explain which discount rate offers a more sustainable option in this case.

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?