Stoichiometry Assessment A

1. If 13.5 moles of oxygen are reacted with an excess of ammonia, how many moles of NO and of H20 are

formed given the following reaction? Show all work for credit.

4 NH3 + 502 - --> 4 NO + 6H20

An unknown substance turns blue litmus paper to red. Which additional test could be used to confirm the substance's identity? It should turn phenolphthalein from colorless to pink because it is a base.

The mammoth hot springs were most likely formed when

Calculate the mass, in grams, of each sample. a. 1.1 * 1023 gold atoms b. 2.82 * 1022 helium atoms c. 1.8 * 1023 lead atoms d. 7.9 * 1021 uranium atoms

A 0.2000 g sample of a compound (vitamin C) composed of only C, H, and O is burned completely with excess O2. 0.2998 g of CO2 and 0.0819 g of H2O are produced. What is the empirical formula?

This is a type of chemical reaction that involves the loss of water from the reacting molecules.

What are the two characteristics of air mass

Explain how humans have impacted the biome in which you live which is missouri

A scientist conducts an experiment to determine which fungi glow under ultraviolet light. What did the scientist most likely do before conducting the experiment? O A. Form a hypothesis B. Analyze data O c. Develop a theory D. Draw a conclusion

What is the difference between a contractor and a starter

What is more dangerous, current or voltage? Why?