Answer the following question given this paragraph: 

Magnesium carbonate, aluminum hydroxide, and sodium bicarbonate are commonly used as antacids. Give the empirical formulas and determine the molar masses of these compounds. Based on their formulas, suggest another compound that might be an effective antacid. ♦ Nickel(II) acetate, lead(II) phosphate, zinc nitrate, and beryllium oxide have all been reported to induce cancers in experimental animals.


Q: What are magnesium carbonate, aluminum hydroxide, and sodium bicarbonate commonly used as?


A:
antacids