300. mL of a 0.25 M solution of NaCI is diluted to 500. mL. What is the new concentration?

Write a paragraph at least 10 sentences explaining how rocks are used today in society

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)

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy