Which of the following is an example of a decomposition reaction?

a) 4p + 5o --> 2p2o5

b) ch4 + o2 --> co2 +2h2o

c) mnso4 --> mno + so3

d) mg + 2hcl --> mgcl2 + h2

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.

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.