Answer: B Reference: Explanation: Type: Multiple Choice DiFculty: Medium Category: Understand 12. The term constant returns to scale describes a situation where A. expanding all inputs does not change the average cost of production. B. a larger-scale Â±rm can produce at a lower cost than a smaller-scale Â±rm. C. expanding all inputs changes the average cost of production. D. the quantity of output rises and the average cost of production falls. Answer: A Reference: Explanation: Type: Multiple Choice DiFculty: Easy Category: Remember 13. In microeconomics, the term ___________________ is synonymous with decreasing returns of scale.
Combustion Reactions. A combustion reaction is when a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat. A combustion reaction always has oxygen as one reactant. The second reactant is always a hydrocarbon, which is a compound made up of carbon and hydrogen. A combustion reaction also always produces CO2 and H2O. Balancing Combustion Reactions. Balancing combustion reactions is easy. First, balance the carbon and hydrogen atoms on both sides of the equation.
Incomplete combustion Incomplete combustion of hydrocarbon occurs when there is a limited supply of oxygen. The products of incomplete combustion can vary. One of the products is carbon monoxide which is a toxic substance. C7H16(l) + 7O2(g) Ã 3C(s) + 2CO(g) + 2CO2(g) + 8H2O(G) + energy 2C7H16(l) + 11O2(g) Ã 3C(s) + 114CO(g) + (g) +8H2O(G) +energy The hazards of combustion Reactions The combustion of hydrocarbons can produce substances that can have an impact on our environment.