PREDICT What are some of the criteria and constraints an engineer might consider when attempting to
increase the fuel efficiency of a vehicle? How might
factors such as vehicle performance, maintenance, and
cost be factored in?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

What is the indicator of the number of ions in solution? the amount of conductivity the amount of precipitate the amount of solute added

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.