Which subatomic particles are located in the nucleus of a ca-40 atom? 1) electrons and neutrons
2) electrons and protons
3) neutrons and protons
4) neutrons, protons, and electrons

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?

May someone me with these science questions

How does concentration affect reaction rate