Challenge Problems
- Gas grills burn propane in order to cook food. How many grams of oxygen is needed to combust a 1.00 L container of propane (C3H8)? (The density of liquid propane is 0.5005 g/mL)
21. When iron is left unprotected, such as a nail exposed to the elements, it will develop a red-brown rust coating that weakens the structure of the nail. This coating is the result of the reaction between the iron and oxygen in the air (an oxidation reaction). If a 2.8 g nail (made of solid iron) is left outside, how many grams of iron (III) oxide (rust) will accumulate on the outside of the nail?
22. Magnesium hydroxide is a common ingredient in antacids. The neutralization of hydrochloric acid in the stomach by magnesium hydroxide is a double displacement reaction. How many grams of magnesium hydroxide are required to neutralize 4.5 g of hydrochloric acid?
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