The diagram shows water in a graduated cylinders. Graduated cylinder B has 30 mL of water. What is this statement and example of?
(4 Points)
Prediction
A theory
An observation
A hypothesis

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)

If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.