Please help I've literally tried every answer and I cant find it: Determine the neutral formula unit for the compound formed from the ions Mg2+ and SO2−3.

One does not belong why? ice, gold ,wood ,diamond and table salt

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness