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One half of the distance between the nuclei of two adjacent metal atoms in a close crystal lattice is called
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A high carbon dioxide level is going outside the cell membrane with the low carbon dioxide levels. is this diffusion, active transport, our facilitated diffusion
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1) When using the numerical meaning of a metric prefix (i.e. milli = 0.001) in relating the prefixed unit (mL) to the base unit (L), always put the number "1" with the Question 1 options: base unit (i
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Ercury is a liquid that has a density of 13.5 g/mL. Water has a density of 1.0 g/mL. Equal volumes of mercury and water are in identical containers. Explain why the pressures exerted on the bottoms of
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Quartzite and marble can look similar. Quartzite's compsition is quartz and parent rock is sandstone. Marble's composition is calcite and and parent rock limestone. Thinking about the composition and
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What determines the difference between a slate and a gneiss rock that both are formed from a shale? What role does the parent rock play in determining the type of metamorphic rock that will be formed?
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1) When using the numerical meaning of a metric prefix (i.e. milli = 0.001) in relating the prefixed unit (mL) to the base unit (L), always put the number "1" with the Question 1 options: base unit (i
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If a substance is impure, not only is the melting range broad more than 2.5°C, but the top of the range is below that of the true melting point. How?
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Write a detailed step-by-step procedure for a titration experiment to determine the percent h2o2 in the sample. include all the materials, glassware and experiment that will be needed, safety precauti
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Write the empirical formula for at least four ionic compounds that could be formed from the following ions
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Question 1 Which of the following is a possible set of quantum numbers for an electron n, l, m subscript l, m subscript s ? (1, 1, 0, +one over two ) (2, 1, 1, +one over two ) (3, 2, 3, -one over two
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You investigate the density of a chemical solution and get the results: 3.4 g/mL, 3.6 g/mL, and 3.7 g/mL. If the true density of the solution is 4.4 g/mL, what can be said about your results?
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Mathew is simulating forces on a simple machine. He runs four tests as shown. Which test illustrates a balanced net force?
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What information is shown in an atom’s electron dot diagram? the number of shells an atom has the number of electrons in each shell of an atom the number of valence electrons an atom has the number
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2. Compare and contrast a lunar eclipse with a solar eclipse. Does one last longer than the other? How often do they occur?
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The order in which atomic orbitals are filled is based on what factor? The potential energy of the orbital. The highest energy level available. The overall energy level of the orbital. The available e
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In a lab a student dissolves 6.9 g of sodium chloride in 125 g of water what is the molaity concentration of a solution
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List one statement from Dalton's atomic theory that has been disproven by later experiments and findings.
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How many dots should the symbol of chlorine in a properly drawn Lewis Dot Structure? •1 •2 •4 •7
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Examine the nuclear reaction: mc007-1.jpg. Why is this classified as a nuclear reaction rather than a chemical reaction?
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Which of the following pairs of elements could possibly be in the same group on the periodic table? (2 points)
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What volume of CO2 would be produced at 37 degrees and standard pressure also how many grams of H2o will be produced and how many molecules of CO2 will be formed?
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A 5.0 gram sample of lead and a 3.2 g sample of iron are placed into 367 mL of water. What will be the new volume level of water in units of mL? The density of lead is 11.34 g/cc and the density of ir
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Which is the first step in an arson investigation that helps reconstruct the fire?A. taking inverntoryB. taking photographsC.taking samples of ignition sourcesD.interviewing witnesses
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the term Koinai Ennoiai refers to _____ ?general assentspeculative ideasuniversal assent innate ideas
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"When metals react with acids, the metals will always be oxidised and hydrogen will always be reduced"Is the statement above true or false? Provide a detailed explanation of whether the following stat
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What are the long term trends marking the expansion of suffrage in the united states over the years?
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• calculate the quantity of heat involved to convert 500. g of ice at -50.0°c to steam at 200°c. the heat of fusion is 333 j/g and the heat of vaporization is 2256 j/g. specific heat of ice = 2.06
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½H2(g) + ½I2(g) → HI(g), ΔH = +6.2 kcal/mole 21.0 kcal/mole + C(s) + 2S(s) → CS2(l) The temperature of the surroundings will: increase or decrease
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I really need help... 20 POINTS!! The taxonomic reference for lemurs is Eukarya, Animalia, Chordata, Mammalia, Primate, Lemuridae, Lemur, catta. Lemurs belong to which phylum? A. Chordata B. Animali
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Consider the following enthalpy diagram. mc024-1.jpg What is the overall enthalpy change DHrxn for the system? -1,300 kJ -300 kJ 300 kJ 1,300 kJ
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I'm not sure how to go about this question is it true?Explain whether the following statement is true:"When metals react with acids, the metals will always be oxidised and hydrogen will always be redu
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A student measure the mass and volume of a piece of aluminum. The measurements are 25.6 g and 9.1 cubic centimeters. Teh student calculated the density of the aluminum. What is the percent effor of th
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how is it that an electron behaves like a particle and at the same can act like a wave?he dual property of an electron was coined by a French physicist known as Louis de Broglie. He suggested that an
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For lunch, a patient consumed 3 oz of skinless chicken, 3 oz of broccoli, 1 medium apple, and 1 cup of nonfat milk (see Table). How many kilocalories did the patient obtain from the lunch?
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What volume of a 4.0 M stock solution of HNO3 is needed to prepare 4.5 L of a 2.5 M HNO3 solution? (1 point)
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Se considera compusii organici cu formula generala Cn H2n-2 Cl2 care contin 56,8% Cl. a) sa se determine F.M. a compusilor organici considerati; b) sa se calculeze NE; c) sa se scrie formulele structu
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State the relationship between the number of electrons in a carbon-nitrogen bond and carbon-nitrogen bond energy
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Several general characteristics of metabolic reactions or reaction pathways are listed below. sort them into the appropriate metabolic category. note: if you answer any part of this question incorrect
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The picture is a model of a nitrogen atom. What is incorrect about the atomic orbital arrangement of electrons in this model and how should they be arranged?
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For an experiment, a biology student makes 1 liter of a solution containing the following substances, which are shown in the table below. Using the given information, fill in the missing parts of the
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If the temperature of an object is 335 K, how would this be expressed on the Celsius scale? A. 608°C B. 273°C C. 37°C D. 62°C
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Which one of the following methods could you use to separate NaCl from water? Disintegration Distillation Dissolution Dehydration Flag Question
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When chromium loses two electrons, its configuration changes to A. [Ar]3d4. B. [Ar]4s1. C. [Ar]4s13d4. D. [Ar]4s13d5.
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Electronegativity tends to increase from left to right across a row, because A. the shielding effect increases. B. the number of energy levels increases. C. the attraction between the nucleus and the
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I need help with a chemistry question: Understanding how electrostatic forces cancel The picture of the question is attached.
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An element “X” has mass number 35 and the number of neutrons is 18. Identify the group number and period of “X”.
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How much carbon dioxide is produced from the complete aerobic catabolism of fructose-1,6-bisphosphate?
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The line between which two points would describe a process of liquid ammonia boiling completely away?
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Black and green tea have a growing body of research suggesting there are positive health benefits on because of the anti-oxidants. However, there is ongoing discussion about the impact of adding milk
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