Master Chemistry with Fun Quizzes & Brain Teasers!

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A group of students are studying the movement of thermal energy. The teacher asks the students to place the palms of their hands flat on their tabletops and describe what is happening. Which statement below best describes why the table feels cold?
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Based on the results the students record, which group makes the most accurate measurements of the object?
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How many grams are in 5.90 moles of C8H18?
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identify which statement is true
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Line M passes through the points (-5, 9) and (-1,9).1210-862-12-10-8-6-4-2226 8 10 12 X6-10-12-Which is true of line M?
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Burning 1 kg of coal releases about 3 million joules of energy. If you could use all of the chemical energy to lift another kilogram of coal, how high could you lift it?
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Sodium, an alkali metal, and chlorine, a halogen, are both in Period 3 of the periodic table. Which element hasa higher ionization energy? Explain your answer.
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Which of the following best describes the structure of a nucleic acid? aCarbon ring(s) bGlobular or fibrous cSingle or double helix dHydrocarbon(s)
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Which of the following BEST describes the main function of carbohydrates? aSpeeding up chemical reactions bFuel cInstructions for making proteins dEnergy storage
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Consider the reaction pathway graph below.Which statement best describes this graph?This is an exothermic reaction with a positive Hrxn.This is an exothermic reaction with a negative Hrxn.This is an endothermic reaction with a positive Hrxn.This is an endothermic reaction with a negative Hrxn.
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Which of the following best describes the structure of a carbohydrate? aCarbon ring(s) bSingle or double helix cHydrocarbon(s) dGlobular or fibrous
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Which is the best molecule to build collegen, muscle repair, and tendon repair? acarohydrates blipids cnucleic acids dProteins
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Consider the diagram below.What does C represent?A) enthalpy of reactionB) activation energyC) activated complexD) energy of the reactants
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Which table best summarizes the subatomic particles and their electrical charge?HF protonnegativepositiveno chargeneutronelectronpositiveno chargenegativeprotonneutronelectronG protonneutronelectronpositivenegativeno chargeprotonneutronelectronno chargepositivenegative
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What happens when the sound waves released by a bat hit an object?O The sound waves are diffused.O The sound waves are reflected.O The sound waves are refracted.O The sound waves are absorbed.
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How many grams are in 2.40 moles of sodium hydroxide (NaOH)?
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Which statement best describes how to read a reaction pathway graph for an endothermic reaction?A) Reactants absorb a minimum amount of energy and then release a larger amount of energy as products form.B) Reactants release a minimum amount of energy and then absorb a larger amount of energy as products form.C) Reactants absorb a minimum amount of energy and then release a smaller amount of energy as products form.D) Reactants release a minimum amount of energy and then absorb a smaller amount of energy as products form.
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Define cation and anion. In which case are electrons gained? Lost?
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Which of the following configurations would form a bent molecule?A. A molecule with three bound atoms and no lone electron pairsB. A molecule with two bound atoms and no lone electron pairsC. A molecule with one bound atom and two lone electron pairsD. A molecule with two bound atoms and one lone electron pair
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What is the rule of zero charge?
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Which of the following has the correct arrangement of atoms in order of increasing atomic radius?A). Mg, Na, P, Si, ArB). Ar, Mg, P, Na, SiC.) Na, P, Si Mg, ArD.) Ar, P, Si, Mg, Na
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How do balanced chemical equations thon theconservation of mass?They show that the atoms in the productsmay be different than the readarts as longas the mass does not change,They show that the atoms in the products arethe same as in the reactants, but the numberof atoms must change,They show that the number of atoms of eachelement is the same in the products andreactants
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HELPPP MEE I NEED HELPP PLEASE Which person participates mostly in the quaternary level of an economy?A. A coal miner3. A car mechanieC. A college professorD. A car factory workerSUBMIT
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