Compound A, C7H14, decolorizes (reacts with) Br2 in CCl4 and also reacts with BH3.THF followed by H2O2 and NaOH to give compound B. When treated with KMnO4 followed by H3O , compound B is oxidized to a carboxylic acid, compound C, that can be resolved into enantiomers. Compound A, after ozonolysis-reduction gives two products, one of while is the same compound, compound D, as is formed by the oxidation of hexan-3-ol with Na2Cr2O7 and H2SO4. Give the structure for compounds A, B, C, and D. Use the Question 30 Answer Sheet for your answer. Each structure is worth 4 points.

Compare and contrast physical changes with chemical changes.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Can someone me with 3 and 4 plz. this is for masteries test.