400 A) Zero 300 B) First 200 C) Second 100 D) Third E) Cannot determine order from this information 60 120 180 240 300 360 Time (s) 1/[A] (M-1)

Determine the structures of the missing organic molecules in the following reaction: Y II OH X + H₂O H+ H* OH Note: Molecules that share the same letter have the exact same structure. In the drawing area below, draw the skeletal ("line") structures of the missing organic molecules X and Y. You may draw the structures in any arrangement that you like, so long as they aren't touching. Click and drag to start drawing a structure. C X :0 Ś m c+

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Methane is oxidized in the atmosphere by photochemical reaction. Write the chemical equation of this reaction?_CH4 + O2  CH2O + H2OCH4 + O  H3C. + H. + O.CH4 + O  CH3C. + HO.CH4 + O  .CH3 + HO.

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. It contains the biological instructions that make each species unique. DNA, along with the instructions it contains, is passed from adult organisms to their offspring during reproduction. Nearly every cell in a person's body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA). The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences. DNA bases…

4 Why would the chemical equation 1 B2(CO3)3 →1 B2O3+3 CO2 be considered “wrong”?

You are a forensic scientist. You are investigating a murder involving poison. The victim was poisoned with a compound called di-chlorobenzene, whose formula is C6H4Cl2. Autopsy results show that the victim’s body contained about 27.5 g of the poison, but the actual amount could have been slightly higher due to tissue absorption. The main suspect is his wife, Suzanne, who works as a chemistry professor. Records show that she purchased 15 g of benzene (C6H6) two days before the murder. Benzene is one of the compounds use to make the poison. She claims she was using it to make methyl benzene (C6H5CH3), an innocuous compound, for use in her lab. She shows you the bottle of methyl benzene she claims to have made. It contains 25 g of methyl benzene. To produce di-chlorobenzene, the reaction is:       Cl2(g)  +  C6H6(l) ⟶⟶ C6H4Cl2(l) + H2(g) To produce methyl benzene, the reaction is:          CH4(g) + C6H6(l) ⟶⟶ C6H5CH3(l) + H2(g)   Use stoichiometry to solve this case. Be sure to show all…

2. The Nobel Prize in chemistry for 2,000 was nominated by Heeger. Macdiarmid and Shirikawa with “Discovery and development of conductive polymer". How can plastic become conductive? Explain by using polyacetylene.

ΝΗ + H₂O H2SO4 Draw structural diagrams or line drawings for all products. Name all reactants and products