In which of the following are the symbol and name for the ion given correctly

This question is incomplete but the completed question is below

In which of the following are the symbol and name for the ion given correctly?

a. Fe2+: ferrous ion; Fe3+: ferric ion

b. Sn2+: stannic ion; Sn4+: stannous ion

c. Co2+: cobalt(II) ion; Co3+: cobaltous ion

d. Pb2+: lead ion; Pb4+: lead(IV) ion

The correct option is a

Explanation:

In this question, the knowledge of ion naming is been tested. Below, the ions and there correct names will be presented

Pb2+ is lead (II) ion

Pb4+ is lead (IV) ion

Co2+ is cobalt (II) ion and it is also called cobaltous ion

Co3+ is cobalt (III) ion

Sn2+ is tin (II) ion and it is also called stannous ion

Sn4+ is tin (IV) ion and it is also called stannic ion

Fe2+ is iron (II) ion and it is also called ferrous ion

Fe3+ is iron (III) ion and it is also called ferric ion

From the above, we can deduce that option a is the one that has it's symbol correctly attached to it's name

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them