What will most likely be observed when sulfur powder and iron powder are mixed together and then add water

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

The appropriate concentration for an iodine sanitizer is

When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.