Which of them is the right symbol for the element?

Al (2) OR 2Al

How many atoms are in 1 mole of hydrogen

In which location is most of the mass of our solar system? A. The asteroid belt B. Earth and the other planets C. The various D. The sun

Which is the best example of how electromagnetic energy is used in everyday life?

What is the electron configuration of silicon?

Which substance will most likely ionize when it is dissolved in water? HBr CaBr2 MgCl2 KCl

A balloon is filled with 12L of air at a pressure of 2 atm. What is the volume of ballon if the pressure is changed to 3 atm?

What ionic bond occurs between what particles? A. Two Negative Ions B. A positive and negative ion C. Two positive ions D. Two neutral atoms

Which of the following are good traits of a hypothesis? it will be able to be tested it can predict an outcome it will explain the observations all of these

What is the mass of a box of nails

In a phase change of water between the liquid and the gas phases, 770.1 kJ of energy was released by the system. What was the product, and how much of it was formed in the phase change? (dа ta: H₂O (l) → H₂O (g) ΔH = 44.01 kJ/mol.) A.