Chemistry

Name two kinds of rocks formed by conduction of energy.
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A box is initially at the top of a slide, storing 80 J of gravitational energy. The isolated system includes the box, slide and earth.As the box slides down the frictionless slide, what happens to the total energy of the system?1-the isolates system stores slightly less than 80 J of total energy, and it is converted to a different form of energy2- The isolated system stores 80 J of total energy, but it is converted to a different foe of energy 3- The total energy of the system increases to more than 80 J as it gains other forms of energy4- The total energy of isolated system decreases to 0 once the box reaches the bottom of the slide
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When hydrochloric acid reacts with sodium sulfide, hydrogen sulfide gas and sodium chloride are produced. How many moles of H2S will be generated by 2.56 moles of HCl?2HCl + Na2S H2S + 2NaCl
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Analysis of a sample of a compound, containing only carbon, nitrogen, hydrogen, and oxygen, determined that it contained 20.0% C, 6.7% H, 46.6% N and the balance O. What is the empirical formula of the compound?
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Question 1 of 102 PointsAccording to Le Chtelier's principle, how will a pressure increase affect asystem that includes matter in the gas phase and another phase?OA. The total number of gas molecules will increase.OB. The equilibrium reactions will slow down.C. The system will remain unchanged.oooD. The total number of gas molecules will decrease.
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In what sense is the wave motion of a guitar string analogous to the motion of an electron in an atom?
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the number of moles of H2O produced from 339 grams of SnO2
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An Apple iPhone has a mass of 112 g. What is its weight in ounces? (Given: 1 lb = 454 g; 1 lb = 16 oz)
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The following peptides are subjected to normal electrophoretic analysis at pH 6.0. State whether the peptides will migrate towards the cathode or anode and predict the relative rate of migration of each peptide. a.GlyArg Phe.b.Gly.Arg Phe.c.Glu.Glu Phe.d.GIy.Glu
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A permanent magnet can affect:OA. both permanent magnets and electromagnets.O B. both non-magnets and electromagnets.Oc. only permanent magnets.OD. only electromagnets and charged particles.SUBMIT
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Calculate the mass of 15.73 L of krypton gas at STP.
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By what factor does the rate change in each of the following cases (assuming constant temperature)? (a) A reaction is first order in reactant A, and [A] is doubled. (b) A reaction is second order in reactant B, and [B] is halved. (c) A reaction is second order in reactant C, and [C] is tripled.
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Elements that typically give up electrons _______
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How many orbitals are in the n = 3 level?
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Sodium tends lose a single electron in natural settings. Based on what you know, what are two other elements that tend to do the same thing?
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Which of the following types of molecules always has a dipole moment? Linear molecules with two identical bonds. Trigonal pyramid molecules (three identical bonds). Trigonal planar molecules (three identical bonds equally spaced). Tetrahedral molecules (four identical bonds equally spaced). None has a dipole moment.
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Which of the following statements describes a problem associated withchemicals made by chemists?OA. They are in medicines,OB. They can be released into the environment,C. They can be found in food,OOD. They can be in cleaning products.
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Which are made of matter?living things onlyboth living and nonliving thingsnonliving things onlysome living and all nonliving things
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Radioactive phosphorus is used in the study of biochemical reaction mechanisms because phosphorus atoms are components of many biochemical molecules. The location of the phosphorus (and the location of the molecule it is bound in) can be detected from the electrons (beta particles) it produces. 32P 32S + e 15 16 Rate = k [32P], where k = 4.85 102 day1 What is the instantaneous rate (in mol/L/d) of production of electrons in a sample with a phosphorus concentration of 0.0031 M?
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to what temperature must a sample of nitrogen at 27 degrees C and 0.625atm be taken so that its preassure becomes 1.125atm at constant volume?
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A solution containing CaCl2 is mixed with a solution of Li2SO4 to form a solution that is 2.1 10-5 M in calcium ion and 4.75 10-5 M in sulfate ion. What will happen once these solutions are mixed? The Ksp for CaSO4 is 2.4 x 10-5.
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What is the density of atoms/nm^2 on the (110) plane of a zinc blende lattice with lattice spacing 0.546 nm. Three significant digits, fixed point notation.
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If you wanted to repeat your experiment, you could do it once, then do it again, and so on. You could also _____.
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Write the full electron configuration of the Period 3 element with the following successive IEs (in kJ/mol):IE = 738IE = 1450IE = 7732IE = 10,539IE = 13,628
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