How do you balance the following equation only using coefficients?

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.