The graph below shows how solubility changes with temperature. Which two solutions have similar solubilities at 40°C? Na2SO4 and NaCl
Na2HAsO4 and NaCl
Na2HAsO4 and Na2SO4
Ba(NO3)2 and Ce2(SO4)3 • 9H2O

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.

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

Match the mixture with the substance// i really need on this guys (it’s a pic btw)