A chemical reaction occurs. Which of the following would indicate that energy is transformed during the reaction? A. light is produced B. an electrical charge is produced C. heat is produced D. all of these

Is there an N-Cl bond in solid ammonium chloride?

Both equation I and II are balanced, but equation II is the correct way to write the balanced equation. Why do you think this is? (Hint: Think fractions.) I) 2 SnO2 + 4 H2 → 2 Sn + 4 H2O II) SnO2 + 2 H2 → Sn + 2 H2O

What units are used to express energy transfer?

Nitric acid + mg (no3) 35.0 ml of 0.255 m nitric acid is added to 45.0 ml of 0.328 m mg (no3) 2. what is the concentration of nitrate ion in the final solution? a. 0.481 m b. 0.296 m c. 0.854 m d. 1.10 m e. 0.0295 m

What volume would 1.5 mol of nitrogen gas occupy at standard temperature and pressure?

Consider the following representation of a reaction mechanism. Step 1: Unimolecular (fast) Step 2: Bimolecular (slow) Step 3: Unimolecular (fast) Which conclusion about the rate law for the reaction above is reasonable? A.

1. Which of the following best describes an example of pure chemistry? a) testing the effects of lower concentrations of a drug on humans b) studying chemicals containing carbon c) developing a cure for osteoporosis d) finding an antidote for a new

Problem 1: For which of the following activities might you want to hire a chemist? A. building a garage B. testing a sample of water from a well C. finding a comet D.

Why do most living things need food water and the ability to get rid of waste?

What is the effect of adding more water to the following equilibrium reaction? CO2 + H2O - > 2H2CO3