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Questions in chemistry

[Solved] Inside a volcano, how do the slanted layers of hardened lava form?

[Solved] What is a radical? A. A group of atoms that act like one atom. B. A group of ions that have no charge. C. A group of ions that break up during a reaction. D. A group of atoms that give off radiation.

[Solved] Select all of the answers that apply. Which of the following are ways the atmosphere supports life? A. Contains trace gases B. Blocks harmful UV rays C. Transports and distributes heat D. Cycles essential elements: C, O, and N

[Solved] Why is absolute dating more accurate than relative dating? Select one: A. Relative dating uses the half-life of an element. B. Absolute dating uses the half-life of an element. C. Relative dating compares the placement of fossils. D. Absolute dating uses more fossils than relative dating.

[Solved] What is the chemical formula of CClâ‚„? Please explain.

[Solved] Uranium-238 has a half-life of 4.5 billion years. Given that scientists estimate Earth's age to be 4.6 billion years, what is the most likely percentage of parent to daughter isotopes of this element currently existing on Earth? A. 10 percent B. 25 percent C. 50 percent D. 75 percent

[Solved] Atoms of which two elements in the ground state contain the same number of valence electrons? A. Al & Si B. Al & B C. Al & Zn D. Al & Ge

[Solved] If we place an enzyme in a strongly acidic pH, which of these is most likely to happen? A. The reaction will happen much faster at the extreme acidity. B. The reaction will not happen. C. The reaction will occur as if the enzyme were at neutral pH.

[Solved] The element carbon is present in all organic compounds. Which reason would explain why there are so many different types of organic compounds? A) Carbon is a nonmetal. B) Carbon has an atomic number of six. C) Carbon can form four covalent bonds. D) Carbon has a total of six electrons.

[Solved] Which of the following characteristics of the arctic rabbit is specifically an adaptation to living in the tundra? - Small size - Keen eyesight - Strong legs - White fur