Help.

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?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium