An engineering team designs a new rocket that is faster and lighter than any other model being produced. However, the materials end up being so expensive that no company can afford to buy them. Which step of the engineering process should have addressed this problem?

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.