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🧪 Chemistry

Chemistry is the scientific study of the properties and behavior of matter. It is a natural science that covers the elements that make up matter to the compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.

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Q: How many significant digits are in the number 4000000
1 answer
Q: What chemical reaction that occurs when a mixture of gasoline and air is ignited by a spark is called a
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Q: A solution of HBr has H plus equals 2.1 x 10-6 What is the pH of this solution
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Q: Heat energy coming from inside earth heat from volcanoes or geysers
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Q: What did the can lead to one group bearing the blame for others
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Q: What is octet rule explain using example
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Q: What is the pressure of gas at stp
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Q: Are Transition metals good conductors of thermal energy
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Q: What takes up space in a atom
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Q: What is the name of the functional group that is made of acarbon atome double bonded to an oxygen atom
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Q: Matter in a solid or liquid form is
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Q: The charges in a compound should always add to .
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Q: Another name for a group of elements that have similar properties
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Q: What is the stable isotope that is formed by the breakdown of a radioactive isotope
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Q: How much heat is needed to raise the temperature of 5.58 kilograms of iron from 20.0 to 1000.0 celsius specific heat of iron is 450000 joules
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Q: What two minor layers are parts of a main layer of earth's atmosphere
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Q: How many significant digits are in the number 50.00
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Q: If an element has three isotopes with known masses what information is needed to find the average atomic mass of the element
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Q: What is Einsteins matter energy equivalence
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Q: What type of bond forms a polar molecule
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Q: What does the Bohr Model represent
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Q: What effect does catalyst have on a reaction
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Q: After a rabbit population reaches the carrying capacity of its habitat the population of rabbits will most likely
2 answers
Q: What type of crystalline solid can be found in metal atoms
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Q: Where is Carbon the element located
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Q: Is Zn plus CuCl2 yields ZnCl2 plus Cu a redox reaction
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Q: How do atomic radii change as electrons are added to a shell
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Q: Should you never change a subscript to balance an equation
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Q: When would dipole dipole be significant
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Q: What is true of catalyst
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Q: What is the formula for potassium and oxygen to give potassium oxide
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Q: Difference between evaporation and boiling
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Q: How do the light reaction help the Calvin cycle
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Q: What is the electronegativity of NaCl
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Q: What is the complete ionic equation for NaOH plus HC equals H2O plus NaCl
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Q: Is it right all Arrhenius bases are Brownsted Lowry bases
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Q: Choose the correct formula for this compound silver oxalate
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Q: Which of these method does not form base
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Q: What type of property is exhibited when when glass tubing is heated over the flame
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Q: What the element with the highest first ionization energy in group 14
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Q: Calculate the number of moles in 27.50 grams CaCOËÄ Type the correct answer then press Enter
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Q: Which electrons are the valence electrons of the atom
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Q: What phases of matter gives off light
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Q: Is a solid a substance
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Q: What is the correct compound name for compound CaO
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Q: Which elements atomic nucleus contains 11 protons
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Q: What is a characteristic of the lanthanides
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Q: Which of the following best defines sense of self
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Q: Convert 75ô C to the kelvin scale
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