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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: Which electrons are the valence electrons of the atom
1 answer
Q: What phases of matter gives off light
1 answer
Q: Is a solid a substance
1 answer
Q: What is the correct compound name for compound CaO
1 answer
Q: Which elements atomic nucleus contains 11 protons
1 answer
Q: What is a characteristic of the lanthanides
1 answer
Q: Which of the following best defines sense of self
1 answer
Q: Convert 75ô C to the kelvin scale
1 answer
Q: Predict the product of this compound ZnO plus COea æ
1 answer
Q: What are the products of this chemical reaction HCI reacts with solid NaOH
2 answers
Q: How many electrons does iodine have in its outer ring
1 answer
Q: What is the difference between a strong base and a weak base
6 answers
Q: What is the molality
2 answers
Q: What is the oxidation number for NaClO3
2 answers
Q: DID OXIDATION AND REDUCTION PROCCED SIMULATANEOUSLY
2 answers
Q: What is the density of a black of wood with a mass of 120 g and a volume of 200 Cm3
1 answer
Q: What happens to the pH if a small amount of strong acid is added to an non buffered solution
1 answer
Q: How many possible isomers of heptane are there
1 answer
Q: What can be said about a reaction with h=-890 kj/mol and s = -0.24 kj/mol
1 answer
Q: Is melting point a extensive or a intensive property
1 answer
Q: When white light is broken down into a rainbow of colors what color is located between green and indigo
1 answer
Q: What does the term spontaneous mean in a chemical reaction
2 answers
Q: The total number of naturally occurring elements that has been identified is- 92 118 or 126.
1 answer
Q: What causes an ionic bond form
1 answer
Q: The splitting of a heavy nucleus is called
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Q: The periodic law states that the properties of elements will repeat when the elements are arranged by _______.
1 answer
Q: Which bonds are metallic bonds similar to
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Q: What is used to help water wash way greasy dirt
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Q: What is the net ionic equation for the reaction 2kohaq h2so4aq 2h2ol k2so4aq
1 answer
Q: Which one is an example of an indicator litmus paper electricity high concentration or presence of H- ions in solution
1 answer
Q: A decomposition occurs when a substance is broken down into two or more simpler substances in a chemical reaction.
1 answer
Q: What is a solution Apex chemistry
1 answer
Q: What drives the ATP synthase reactions that produce ATP
1 answer
Q: What is the molar mass of Ca(BrO3)2
1 answer
Q: If the particles of matter that make up a substance are relatively far apart and can move freely the substance is in a state.
1 answer
Q: What reactant is necessary for a combustion reaction
1 answer
Q: In a deployed environment you must REACT. What does the R in REACT represents
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Q: What does the C-14 C-12 ratio change with time in fossils
1 answer
Q: What are the science processes and describe each
1 answer
Q: How is endothermic reactions differ from exothermic reactions
1 answer
Q: Does BrF5 bond angles agree with the ideal VSEPR values
1 answer
Q: In situations involving equal masses reactions produce more energy than chemical reactions
1 answer
Q: Which is a property of a pure substance uniform composition fixed composition varying composition
1 answer
Q: Why do different metals have different properties
1 answer
Q: Is phosphorus trichloride a ionic or covalent
1 answer
Q: Can a water molecule be seen through a compound light microscope
1 answer
Q: What type of bond do water molecules from with each other
1 answer
Q: What is the description of chemical reactions involved in cooking when cooking requires continuous addition of energy to the chemical reactions
1 answer
Q: What type of atoms with an atomic mass greater than may under go fission
2 answers
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