300 mL of a 2.5 M sodium carbonate (Na2CO3) solution is diluted to 0.75 M. What is the volume of the new solution? How many grams of sodium carbonate have been dissolved in the solution?

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?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Anurse used a 0.02-mg/l solution of disinfection to clean a patients wound. what is the concentration of the solution expressed as a percentage?