How does an atom become an ion with a -2 charge?

Which of the following statements concerning the influence of culture on ethnic identity formation is accurate? a. one will reject ethnic identity if cultural stereotypes are encountered. b. if one’s ethnic city is different from the dominant cultural group, then one’s ethnic identity you will become weekend. c. if an the ethnic group is excepted by dominant culture, then ethnic identity formation can be a difficult process. d. similarity to the dominant culture can determine how easy it is for one to except ethnic differences.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide