Radiometric dating ... All of these answers are true O provides an accurate means of determining the age of materials that are very old. has helped us determine that the Earth is roughly 4.54 billion years old. O is based on the scientific observation that unstable "parent" isotopes decay into more stable "daughter" isotopes at a constant rate O involves some event that initiates a radiometric clock, such as when a plant or animal dies (radiocarbon).
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- BIOMOLECULES - MULTIPLE CHOICE - Please answer properly QUESTION : Which of the following best describes the relationship between a reactant molecule and an enzyme? A. it is a permanent mutual alteration of structure B. it is one in which the enzyme is changed permanently C. it is an association stabilized by a covalent bond D. it is a temporary associationBiologically, how expensive are you? The elements that make up the typical adult body can be purchased from chemical supply companies for about $3,000-$4,000. However, each of those elements must be chemically bonded to together to produce the complex biological molecules of life (proteins, nucleic acids, carbohydrates, lipids). Using sophisticated laboratory equipment, highly trained scientists can synthesize these complex biological molecules from basic elemental building blocks, but this costs millions of dollars!Consider the differences in worth between the elemental and biomolecular components of life. Explain the difference in terms of the characteristics of life.Explain how the type of decay, the half life and the chemical properties make the following radionuclides suitable for the given applications: A single gram of polonium will reach a temperature of 500°C making it useful as a source of heat for space equipment (α emitter, half lives of polonium isotopes range from less than a second to 200 years).
- A sample of a igneous rock contains small amounts of radioactive potassium and argon. Using the ratio of 40Ar to 40K, it is determined that only 25% of the original parent isotope remained. How old is this rock sample? Please include thought process and a therefore statement. Thank you very much, have a good day!No Plagiarism Please! In one to two sentences, give a reason that chemists would use ribbon diagrams instead of different model type. What type of information do they provide?Ever eat a maggot? Guess again! The FDA publishes a list, the Food Defect Action Levels list, which indicates limits for *natural or unavoidable" substances in processed food (Time, October 1990). So, in 100 grams of mushrooms, for instance, the government allows 20 maggots! The average batch of rich and chunky spaghetti sauce has 350 grams of mushrooms. How many maggots does the government allow in a batch?