The chemical symbol for the element calcium is ca what would be the symbol representing the calcium atoms that has lost atoms that have lost two electrons

Is this a single replacement reaction or there is no

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?

In pqr m< p=60 m< q= 30 and m