Which of these redox reactions is spontaneous as written? a. ni + zn2+ → ni2+ + zn b. mg + li+ → mg2+ + li c. cu + au3+ → cu2+ + au d. zn + ca2+ → zn2+ + ca

Which is true of chemicals? a. things containing chemicals always cost a lot of money. b. chemicals are never dangerous. c. chemicals are in many substances in a home. d. chemicals are rarely found on earth.

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean