Chemistry

The kinetic energy of a pendulum is greatest at the bottom of its swing because the pendulum is A. at its slowest speed. B. at its lowest point. C. at its greatest speed. D. about to swing upward.
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What do dipole-dipole forces do?A. Replace covalent bonds with hydrogen bondsB. Turn nonpolar molecules into solidsC. Hold polar molecules togetherD. Hold nonpolar molecules together
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After brushing, Fluffy's fur has a charge of +8.0 x 10' coulombs and her plastic brush has a charge of -1.4 x 10-8 coulombs. If the distance between the fur andbrush is roughly 5.0 * 10 meters, what is the approximate magnitude of the force between them?(k = 9.0 * 10 newtonmeters/coulomb?)A 5.0 x 106 newtonsB.2.0 x 10-4 newtonsC4.0 x 106 newtonsD. 2.5 x 10 newtonsResetNext2020 Edmentum. All rights reserved.SUS
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Determine the temperature of 2.49 moles of gas in a 1.0-L vessel at 143kPa. R=8.31 kPa*L/(mol*K) Round your answer to 2 sig figs. *
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What happens when kmno4 is heated
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In the following reaction 6.13g of water (H2O) is produced the theoretical yield of water (H2O) is 8.17g, what is the percent yield of water? *C3H8+5 02 3 CO2 + 4 H2OA) 85.0%B) 72.0%C) 75.0%D) 67.0%
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Which situation describes why a rock sinks in water?A. Air pressure is greater than the buoyant force.B. The force of gravity is greater than the buoyant force.c. The buoyant force is greater than the force of gravity.D. The rock is less dense than water.
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Write the full symbol for the isotope of oxygen having 8 neutrons.
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Copper and silver are two examples of atoms that will form a(n) _____.metallic bondionic bondcovalent bondnone of the above
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The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas.C6H12O6(aq) + 6 O2(g) 6 CO2(g) + 6 H2O(l)Calculate the volume of dry CO2 produced at body temperature (37C) and 0.960 atm when 24.5 g of glucose is consumed in this reaction.
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What is the mole fraction of Ba(OH)2 in an aqueous solution that contains 22.8% Ba(OH)2 by mass?
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If 7.0 mol sample of a gas has a volume of 12.2 L, what would the volume be if the amount of gas was increased to 16.8 mol
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How much percent of the earth is water?
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The largest contributed to water pollution is
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PLEASE HELP LOL Accoring to KMT gases are_____mostly empty spaceorvery denseororganized
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Which of the following are incorrectly paired?A) Mercury, HgB) Potassium, KC) Tungsten, TD) Tin, SnE) Antimony, Sb
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If 15 g of CzHo reacts with 60.0 g of Oz, how many moles of water (H2O)will be produced? (Hint: use what you know about limiting reactant) *2 C2H6 + 7 O2 + 4 CO2 + 6 H2OO 1.5 mol H20O1.6 mol H20O1.0 mol H20O1.1 mol H20
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A. An element with the valence electron configuration 5s1 would form a monatomic ion with a charge of ________. In order to form this ion, the element will _______ electron(s) from/into the _______ subshell(s). B. An element with the valence electron configuration 2s22p4 would form a monatomic ion with a charge of ______. In order to form this ion, the element will ______ electron(s) from/into the _______ subshell(s)
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How do the particles of a gas differ from the particles of a solid?
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How many moles of calcium chloride are contained in a 333 gram sample?*A) 8.82 molesB) 0.333 molesC) 4.30 molesD) 0 3.00 moles
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Which of the following describes the change in atomic mass and atomic number during this reaction?
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Which of the following did Antoine Lavoisier correctly characterize as an element? light silicone dioxide mercury
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How do stars contribute to the elements inside you?
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9. Mangnesium can form compounds by acting with different oxidation numbers (2-, 3+, 4+, 6+, 7+). Argue your answer.a) Which of the following species can act as oxidizing agents?b) Which ones as reducing agents?a) Mn2 +b) MnO2c) MnO-4d) NnO2-4e) Mn (OH) 2
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