Mixtures & Formulas

Mixtures & Formulas Discussion Forum Instructions

Each student must post ​(1) substantial initial post with a minimum of 270 words by Tuesday​. All posts and replies must contain​ at least (2) professional references, ​one may be the course textbook, ​properly cited in the current APA format​. Late discussion posts are not accepted in this course.

The student must also reply to ​at least (2) classmates using a minimum of 90 words per reply by Thursday.​ All replies in the discussion forum should enhance the discussion. Non-informative messages posted in the discussion forum will not be counted towards the required number of replies for that topic.

 

Choose ​ONE​ of the following and discuss:

• Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 mole ratio and a sample of water vapor? Explain.

• Chlorine exists mainly as two isotopes, 37Cl and 35Cl. Which is more abundant? How do you know?

• The average mass of a carbon atom is 12.011. Assuming you could pick up one carbon atom, estimate the chance that you would randomly get one with a mass of 12.011. Support your answer.

• Can the subscripts in a chemical formula be fractions? Explain. Can the coefficients in a balanced chemical equation be fractions? Explain.

• According to the law of conservation of mass, mass cannot be gained or destroyed in a chemical reaction. Why can’t you simply add the masses of two reactants to determine the total mass of product?

• In chemistry, what is meant by the term “mole”? What is the importance of the mole concept?

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