The reactants in a chemical reaction contain 900 J of chemical energy. The products of the reaction contain 9000 J of chemical energy. Which statement best describes this chemical reaction?

Pepsin is an enzyme involved in the process of digestion. Its molar mass is about 3.50 * 104 g/mol. What is the osmotic pressure in mm Hg at 30°C of a 0.500-g sample of pepsin in 60.0 mL of an aqueous solution?

If the Density of an object is 5.2 g/cm 3, and its volume is 3.7 cm 3, what is its mass?

Which of the following is a characteristic of the lanthanides? O A. They are silvery metals that conduct electricity. B. There are no known uses for the metals. C. They are all radioactive. D. They are used in making fireworks

What is the molality of a solution made by dissolving 0.0816 moles of C6H1206 into 150.0 g of water?

What is the formula for copper (II) phosphate? Capitalization and punctuation count. How many atoms of phosphorus are in 7.10 mol of copper (II) phosphate?

State the formula for density in words and mathematical symbols.

How many fe (ii) ions are there in 15.0 g of feso4?

An estser is the reaction product between: a. Alcohol and organic acid B. Alcohol and oxygen C. Ketones and Oxygen. D. Aldehydes and Alcohol

How is the way a mixture is combined different from how a compound is combined?

Consider n2 (g) + 3h2 (g) →→ 2nh3 (g). what is the mass of nitrogen gas required to react with 0.129 g h2?