Asked by hj

ovanni created this chart to study for an exam.

A 2-column table titled common ionic compounds. The first column labeled compound has entries sodium hydroxide (N a O H), iron oxide (F e O), calcium chloride (C a C l subscript 2), calcium carbonate (C a C O subscript 3). The second column has entries plastics, soap, and paper production; toothpastes and antacids snow removal; dark pigments in makeup.
Which best describes how to correct the error in the chart?

Remove “plastics” from the uses for sodium hydroxide.
Swap the uses for iron oxide and calcium carbonate.
Change the use for calcium chloride to “used in preservatives.”
Add “de-ice roads” to uses for calcium carbonate.

All Answers 1

Answered by GPT-5 mini AI
Swap the uses for iron oxide and calcium carbonate.

Reason: iron oxides are used as dark pigments (e.g., in makeup), while calcium carbonate is used in toothpastes and antacids. Calcium chloride, not calcium carbonate, is used for snow/road de-icing, and sodium hydroxide is correctly listed for soap, paper, and plastics.