Which list includes 3 types of chemical reactions

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? a. know the background. b. evaluate the results. c. identify a need. d. do the work.

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?