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lil darkie

Public contributions from visitors who posted under the name lil darkie.

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Which of the following was NOT among the ways that the invention of papyrus helped to advance Egyptian society? (1 point) Responses It gave them a way to document and communicate important information. It gave them a way...
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In which of the following ways did Egyptian pharaohs differ from kings of other cultures? (1 point) Responses They were absolute rulers. They were absolute rulers. They were considered gods. They were considered gods. Th...
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Which of the following religious beliefs of the Egyptians helps explain the construction of the pyramids? (1 point) Responses They worshipped the sun; therefore they build pyramids pointing directly at the sun. They wors...
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For what purpose were the pyramids built? (1 point) Responses as temples devoted to the Egyptian gods and goddesses as temples devoted to the Egyptian gods and goddesses as barracks for the Egyptian armies as barracks fo...
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The pyramid at Saqqara is different from the pyramids at Giza in which of the following ways? (1 point) Responses It is larger. It is larger. It was built at a later date. It was built at a later date. It is a step pyram...
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The Old Kingdom, Middle Kingdom, and New Kingdom are significant because: (1 point) Responses they span the entire history of ancient Egypt they span the entire history of ancient Egypt they span the entire history of Eg...
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What is significant about the yearly flooding of the Nile Valley? (1 point) Responses The floods typically killed many people, making it hard to live in the valley; most people moved to the mountains above the riverbed....
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Use the information in the table to answer the question. Bond Between Atoms and Their Respective Electronegativity Bond Bond Energy ( kJ/mol kJ / mol ) H–Cl H–Cl 427 427 Cl–Cl Cl–Cl 242 242 H–H H–H 435 435 Hydrogen and c...
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Use the information in the table to answer the question. Bond Between Atoms and Their Respective Electronegativity Bond Bond Energy ( kJ/mol kJ / mol ) H-I H-I 297 297 H-H H-H 435 435 I-I I-I 151 151 Hydrogen and iodine...
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Which fact must be true if a relationship is endothermic?(1 point) Responses The energy of each bond on the reactant side is greater than the energy of each bond on the product side. The energy of each bond on the reacta...
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Which statement explains the relationship between the amount of energy it takes to break a bond and the amount of energy released when the same bond is formed?(1 point) Responses The amounts of energy are always equal. T...
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Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown. 2HBr → H2 + Br2 The energy of the reactant is 732 kJ/mol, and the energy of the products is 630 kJ/mol. What is the total energy of t...
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When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The equation is shown. H2 + I2 → 2HI2H1 What is the total energy of the reaction? Is this an endoth...
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How is total reaction energy calculated?(1 point) Responses reactant bond energy + product bond energy reactant bond energy + product bond energy product bond energy × reactant bond energy product bond energy × reactant...
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Which result occurs during an exothermic reaction?(1 point) Responses Light and heat are absorbed from the environment. Light and heat are absorbed from the environment. Heat is released into the environment, while light...
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In a chemical reaction, substance A transfers electrons to substance B. Which statement is correct?(1 point) Responses Substance A is reduced and acts as the reducing agent. Substance A is reduced and acts as the reducin...
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In the decomposition of water, why is twice as much hydrogen as oxygen formed?(1 point) Responses Hydrogen gas has two atoms, and oxygen gas has one atom. Hydrogen gas has two atoms, and oxygen gas has one atom. Hydrogen...
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In a synthesis reaction, two atoms of sodium (Na) combine with one molecule of chlorine gas (Cl2) to produce sodium chloride (NaCl). How many molecules of sodium chloride are produced?(1 point) Responses four four one on...
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Question Which statement correctly describes the classification of chemical reactions into different categories?(1 point) Responses All reactions fit into only one category. All reactions fit into only one category. All...
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Use the table to answer the question. Elements with Their Electronegativity Element Electronegativity bromine 2.8 oxygen 3.5 nitrogen 3.0 phosphorus 2.1 Based on the information in the table, which pair of elements would...
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Which phrase best describes electronegativity?(1 point) Responses the partial charge an element carries in a covalent or ionic bond the partial charge an element carries in a covalent or ionic bond the number of electron...
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Based on their locations in the periodic table, which two elements are most likely to form covalent bonds with each other? (1 point) Responses sodium (Na) and bromine (Br) sodium (Na) and bromine (Br) potassium (K) and i...
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Which statement about sodium chloride is correct?(1 point) Responses The sodium atom transfers electrons to the chlorine atoms to form covalent bonds. The sodium atom transfers electrons to the chlorine atoms to form cov...
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Which of the following equations demonstrates the Law of Conservation of Mass? (1 point) Responses CH+O2→CO2+H2O 𝐶 𝐻 + 𝑂 2 → 𝐶 𝑂 2 + 𝐻 2 𝑂 cap c cap h plus cap o sub 2 right arrow cap c cap o sub 2 plus 2 cap h sub 2 cap...
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What does the Law of Conservation of Mass state?(1 point) Response The total mass of all of the reactants prior to a chemical reaction must equal the total mass of all the products after the reaction. The total mass of a...
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