Four friends visited an island. The island was far away from the mainland. No humans lived on the island. The friends talked about what would happen if all of the [plants disappeared on the island. This is what they said. Harold: “I think all the animals on the island would eventually die.”

Jeff: “I think the animals that plants would eventually die without animals that
eat both plants and animals would live”.

Salma: “ I think only the predators on the island would live.”

Misha: “ I think eventually all the animals on the island will become meat eaters,
and they will survive without plants.”

Which friend Explain why you agree.

Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.