Based on the following reaction:     3 CO + Fe2O3  2 Fe + 3 CO2 What is the mole ratio of carbon monoxide to iron(III) oxide that react?    A. 3:2   B. 1:2   C. 3:3   D. 1:3   E. 3:1

Q: A. Br B. C. AB с D E U Br Br OH xs HBr Heat D. E. F. Br Br OH

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Q: 18. How many grams of TiC14 are needed to produce 0.132 moles of MgCl2? 2 Mg + TiCl A. 6.26 g → Ti +…

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Q: None

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Q: 9. What is the starting material in the following reaction? A. I B. II || C. III D. IV LDA CH₂l Br…

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Q: 11. The following reaction will be: a. 2 y 3 b. 3 c. 2 d. 1

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A:

Group 15 elements

The elements of group 15 are phosphorus, nitrogen, bismuth antimony, and arsenic. The most abundant element which is present in the air is nitrogen and the percentage of nitrogen present in the air is 78%. In the free state, the elemental nitrogen is present as diatomic gas (N2). In the organic matter obtained from plants and animals, phosphorus is the dominant element present. In nucleic acids, phosphate groups are present. Phosphates are also found in teeth and bones. The other elements arsenic, bismuth, and antimony are found as sulfides. Arsenopyrite, bismuth glance, and stibnite are examples of sulfides of arsenic, bismuth, and antimony respectively.