Why have some scientists suggest that billions of aluminum balloons should be released into the atmosphere?

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?