21. Which of the following is a correctly balanced chemical equation? A. Cl 2 +2Nal 2NaCl+1 2 C. Cl 2 +Nal NaCl+l 2 B. Cl 2 +Nal NaCl+2l 2 D. 2Cl 2 +Nal 2NaCl+l 2

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes