Use the information to answer the following questions: If 0.45 moles of aluminum are used, how many moles of hydrogen gas will be produced?

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass

Suppose you discovered a new element with 120 protons and 2 electrons in its outer level . i'm what group does this new element belong? what properties would you expect it to have