Fe + Br2 --> FeBr3 How many atoms of iron (Fe) are in the reactants?

How many atoms of bromine (Br) are in the reactants?

How many molecules of bromine are in the reactants?

How many atoms of iron (Fe) are in the products?

How many atoms of bromine (Br) are in the products?

How many particles of iron (III) bromide are in the products?

Is this equation balanced?

If the equation is not balanced, then balance it below :

__Fe + __Br2 ——-> __FeBr3

Plss anybody know how to do this? ? i need the answers from a through d

Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.