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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: Where are the most active metals in the periodic table
1 answer
Q: What happens when a chlorine atom gains an electron in it's outer energy shell
2 answers
Q: The half-life of F-20 is 11.4 seconds When there are 200 atoms of F-20 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 34.2 seconds there are atoms of F-20 re
2 answers
Q: What could the fourth quantum number of 1s2 electron be
1 answer
Q: A compound formed of only phosphorus and oxygen is found to be 56.35 percent phosphorus What is the empirical formula of the compound
2 answers
Q: Why is it important to write a balanced reaction before determining the equilibrium expression and equilibrium concentrations
1 answer
Q: What is the oxidation state of N in N2
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Q: Who won Nobel prizes in both physics and chemistry
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Q: What is an air particle diagram
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Q: Which substance is more acidic than honeybee venom
1 answer
Q: The element's determines how the compound will form
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Q: The energy needed to create bonds between two hydrogen molecules is measured in units called
1 answer
Q: Would result in a decrease in entropy
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Q: If the boats engine has a heat input of 40000 J with 30000 J exhausted into the surroundings the heat sink what is its efficiency
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Q: What is molality of a solution that has 4 mol of KCI in 0.800 kg of water
2 answers
Q: What is BaCl 2
1 answer
Q: What would need to be done to calculate the molarity of 10 g of NaCl in 2 kg of water
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Q: How can you make a liquid boil without applying heat
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Q: Which kind of electrical charge is found on oxygen atom of a polar water molecule
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Q: What is the pH of a weak acid solution that has an H of 2.1 106 M
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Q: How are ketone and aldehydes related
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Q: What is dilute carbonic acid
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Q: What is the correct value of the universal gas constant
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Q: What will most likely happen if a toxin causes the hydrogen ion pump to stop moving h ions outside of the mitochondrial membranes of the birds cell
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Q: What is the chemical elements represented by the following symbol - K
1 answer
Q: This mineral is used in the production of steel and to give color to paint
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Q: What is the Maximum number of electrons in 4d
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Q: Will objects float on water that is less dense or more dense
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Q: What are examples of homogenous mixtures in the kitchen
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Q: What is the conjugate base of NO2
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Q: What is possible effect of an error transcription
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Q: Which formula represents the binary molecular compound dinitrogen tetroxide
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Q: Is Protactinium is radioactive
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Q: Is the atomic emission spectrum of helium on earth the same as the atomic emission spectrum of helium on the moon
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Q: What is the formula for LiNO3
1 answer
Q: In order for proteins to function properly the necessary amino acids must have a specific
1 answer
Q: A crucible and cover are made of .
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Q: Who made the first periodic table
2 answers
Q: What trend the first ionization energy follow in the periodic table
1 answer
Q: Chemicals can be chemically broken down into
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Q: What is the substance that cannot be broken down further by chemical means
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Q: A Chemical is spilled in a grassy area the chemical has been known to kill all bacteria that live in the soil how will this most likely affect the area
1 answer
Q: Honeybee venom is a solution that contains formic acid which gives the venom an approximate pH of 5.0. Which is more acidic than honeybee venom
1 answer
Q: What is the correct name for this compound of NiS
2 answers
Q: What is the percentage composition of K CIO3
1 answer
Q: Velocity of a wave increases and the wavelength stays the same. What will the result be when this happens
1 answer
Q: What is a characteristic aromatic hydrocarbon
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Q: What is a type of bond in which two atoms share a pair of valence electrons
1 answer
Q: And if two pieces of rubbed ebonite are brought close together will they repel or attract each other
1 answer
Q: Which of these electron configurations would indicate a diamagnetic atom
1 answer
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