What property of an atom determines its general reactivity?
Answers
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Related Questions
Which of the following is not a state of matter?A. solidB. liquidC. waterD. plasma
Which of the following ions has a smaller size? Option 1: O2- Option 2: F- Option 3: They have the same size. Option 4: None of the above.
Which statement correctly describes two forms of oxygen, O2 and O3?(1) They have identical molecular structures and identical properties.(2) They have identical molecular structures and different properties.(3) They have different molecular structures and identical properties.(4) They have different molecular structures and different properties.
Explain the cause of the daily tides and give two examples of human activities affected by tides.
a. Polystyrene
b. Nylon
c. Sucrose
d. PVC
Answers
The answer is: sucrose.
Polystyrene, nylon and PVC are examples of a polymer.
Sucrose or table sugar (C₁₂O₂₂O₁₁) composed of two monosaccharides. This monosaccharides glucose and fructose are linked with an ether bond between C1 on the glucosyl subunit and C2 on the fructosyl unit.
Polystyrene is a synthetic aromatic hydrocarbon polymer made from the monomer styrene.
Styrene (ethenylbenzene) is an organic compound with the chemical formula C₆H₅CH=CH₂. It is a colorless oily liquid.
Plastic PVC is organic polymers of high molecular mass derived from petrochemicals.
Final answer:
Among Polystyrene, Nylon, PVC, and Sucrose, the compound that is not a polymer is Sucrose because it is a smaller, simple molecule comprised of two monosaccharides and does not have a long chain of repeating units.
Explanation:
In considering the options provided, Polystyrene, Nylon, and PVC are all polymers. Polymers are made up of many similar units or monomers, and they typically have high molecular weights. Polystyrene, Nylon, and PVC, which stands for Polyvinyl Chloride, are large molecules made up of repeating subunits. The only one which does not fit this particular basis is Sucrose.
Sucrose, commonly known as table sugar, is a small, simple molecule. It is a disaccharide, meaning it is composed of two monosaccharides, glucose and fructose. Therefore, it is not a polymer because it does not contain a long chain of repeating units.
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Cairo
Damascus
Baghdad
Answers
Old City of Jerusalem
(2) the activation energy of the exothermic reaction
(3) the difference between the potential energy of the products and the potential energy of the reactants
(4) the sum of the potential energy of the products and the potential energy of the reactants
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Answer: The correct answer is Option 3.
Explanation:
The net energy absorbed or released in a chemical reaction is known as the total enthalpy change of the reaction. It is written as
The formula used to calculate total enthalpy of the reaction is:
where,
= Potential energy of the products
= Potential energy of the reactants
Hence, the correct answer is Option 3.
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Health claim must be supported by scientifically valid evidence to be approved in using for food label.
This is also a food guide to all consumers the food content implied by manufacturers to their products.
Answer is Health Claim
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The amount of hydrogen produced does not change if the volume of water was decreased to 440mL 400g.
What is Mole?
The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
The reaction will be;
Ca(s) + 2 H₂O(l) → Ca(OH)₂(aq) + H₂ (g)
Since water is in excess, because 0.1 moles of calcium requires only 0.2 moles of water which is 3.6 g, therefore changing the mass of water used will not affect the amount of hydrogen gas produced since the amount of hydrogen gas produced depends on the amount of calcium used.
Therefore, The amount of hydrogen produced does not change if the volume of water was decreased to 440mL 400g.
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Answer:
The volume of hydrogen produced would be the same.
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Carbonic acid dissolves limestone and other rocks. This is an example of chemical erosion. An example is in the caves. Caves are formed where rainwater as it falls through the atmosphere absorbs carbon dioxide. The carbon dioxide makes the rain acidic to react it with the limestone bedrock. The rainwater is absorbed by the soil into the ground. Then as it enters through the soil, the rainwater will absorb more carbon dioxide that is produced by the decomposers. The carbon dioxide with water reacts to form carbonic acid. The carbonic acid will react to limestone and dissolves it slowly. As the space become larger, water can enter into it.
Answer:
chemical errosion
Explanation: