If I contain 6.3 moles of gas in a container with a volume of 30 liters and at a temperature of 300 K, what is the pressure inside the container?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

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 do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?