reactions change old substances into new substances. chemical O physical
Q: A certain reaction has an activation energy of 51.73 kJ/mol. At what Kelvin temperature will the…
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Q: Calculate (to the nearest 0.1 u) the formula mass of these compounds. a. Magnesium Fluoride MgF2 b.…
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Q: ame the compounds. Spelling counts. NI,: Nitrogen triiodide P,S3: Phosphorus sesquisulfide Incorrect
A: NI3 = Nitrogen triiodide P4S3 = Tetraphosphorus trisulfide
Q: An exothermic reaction absorbs energy, so the products have more potential energy than the…
A: In an exothermic reaction, the products have less potential energy than the reactants. This…
Q: What are the similarities and differences between the everyday and technical meanings and uses of…
A: The term "element" has different meanings and uses in everyday language as well as in technical…
Q: Which substance is an element? O 1. CH4 O 2. NaCl O 3. N2 O 4. NO2
A: N2 is an element. N2 is the nitrogen atom or element.
Q: Based on their locations on the periodic table, which two elements would you expect to form positive…
A: Boron and aluminum are the two elements which form ions of +3 charge.
Q: What alloy? What are the reasons for its manufacture? this Explain
A: Alloy - alloy is a substance that are made from combination of more than one metal or mixes a metal…
Q: Discuss Exothermic and endothermic reactions
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Q: 55480/play 6/15 Question Chemistry Reactions Revision What does the diagram represent? 908 1 A…
A: Step 1: By looking at the image we can say that two types of molecules are present. Step 2:…
Q: Bonds One atom of sodium would most likely form an ionic bond with one atom of: O Sodium can not…
A: In the given figure ,Electronic valency of all elements are given, Hydrogen(H) have valency 1.…
Q: the chemcical equation of a firework
A: The most important component of a firework the gunpowder. The combination of sulfur, charcoal and…
Q: 4. Most metals are NOT * O Ductile. O Malleable. O Liquid at room temperature. O Good conductors of…
A: The material that conducts heat and electricity are known as metals. The materials that do not…
Q: Complete the following reaction 81Rb + n 81Sr Р + Ve 81Br 81Kr e 81y
A: A beta particle is an electron or a positron. Beta decay is a type of radioactive decay that takes…
Q: An exothermic reaction involves an increase in entropy. True False
A: The reaction in which energy is released in form of heat or light is called exothermic reaction. In…
Q: Label parts of an equation Fe + 2HCI FeCl, +
A: The given equation is a chemical reaction. In a chemical reaction, substances (the reactants) change…
Q: silver sulfur Ag S. S. (S) How many of cach atom are in the reactants? Ag slver S sufur Balanced…
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Q: Determine the product of the reaction Li + He →? + n. What is the Q value of the reaction?
A: (a)Let the product be NYA. Consider the given reaction.
Q: Atoms become stable when their outer shell is and has valence electrons.
A: Atoms become stable when their outer shell is full and has 8 valence electrons.
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- Question 4 The atomic masses of four element samples are shown in the table below. What would be the most likely arrangement of these elements on the Periodic Table? Atomic Masses of Elements Sample Atomic Mass (amu) 1 5.137 2. 27.718 3. 19.133 12.251 O 1, 2, 3, 4 О 2, 3, 4, 1 1, 4, 3, 2 O 4, 3, 2, 1Which element rarely reacts because it has 8 electrons in its outer shell?Question answer