When a 16.87 g sample of MgCO3 is dissolved in excess HCl, the products are aqueous magnesium chloride, carbon dioxide gas, and liquid water. What volume of CO2 could you expect to be produced? Use the following balanced chemical equation: MgCO3 + 2 HCl → MgCl2 + CO2 + H2O

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?