Please help me answer this and explain to me how to do it There is many more examples similar to this one, I would really appreciate even just an explanation on how to do it.
Many Thanks

i think it is true since you can test the answer and can use observations to complete it.

answer; talc and gypsum;

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.