What kind of bond do these elements usually make? 1. oxygen 2. carbon 3. hydrogen 4. nitrogen 5. calcium 6. phosphorus 7. potassium 8. sulfur 9. sodium 10. chlorine 11. magnesium

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?

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these