Can someone help me I will mark them for the best answer ​

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?

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles