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The volume of a gas is 450ml when it’s pressure is 1.00atm. If the temperature of the gas does not change, what is the pressure temperature when it’s volume is changed to 2.00l?
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C2H4(g) + H2(g) mc009-1.jpg C2H6(g) + 137 kJ What happens to the amount of ethane (C2H6) when the temperature of the system is increased? The amount of ethane decreases. The amount of ethane increases
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Different kinds of lenses are used in eyeglasses to help people with eye conditions. Farsightedness is an eye condition in which distant objects appear clear but close objects appear blurry. Nearsight
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What percent by mass of ammonium sulfate is nitrogen?
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Which one of the following statements is correct? A. Metalloids have a full valence shell of electrons. B. Nonmetals tend to gain electrons when they react. C. Noble gases easily gain electrons to rea
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The graph below shows how solubility changes with temperature. mc022-1.jpg What is the solubility of Na2HAsO4 at 60°C? 20 g/100 mL of water 46 g/100 mL of water 65 g/100 mL of water 70 g/100 mL of wa
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Explain three ways that a river reshapes Earth’s land surface. Be sure to explain how erosion, weathering, or deposition of rock or soil contribute to the change.
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According to the brønsted-lowry theory, which of these acids would have the weakest conjugate base?
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A plot of pressure (mmHg) versus 1/v(mL^-1) using the data collected in the lab produced a linear relationship. The equation that best represents the data is y=43,560x+118.30. Predict the pressure of
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Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
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Complete and balance the molecular equation, including phases, for the reaction of aqueous copper(II) chloride, CuCl2, and aqueous potassium phosphate, K3PO4.
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15) A solution contains 35 grams of KNO3 dissolved in 100 grams of water at 40°C. How much more KNO3 would have to be added to make it a saturated solution?
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What are the concentrations of ohâ and h in a 0.00088 m solution of ba(oh)2 at 25 °c? assume complete dissociation?
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The critical resolved shear stress for a metal is 30 mpa. determine the maximum possible yield strength (in mpa) for a single crystal of this metal that is pulled in tension.
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A reaction has a standard free-energy change of –10.70 kj mol–1 (–2.557 kcal mol–1). calculate the equilibrium constant for the reaction at 25 °c.
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Which best compares the roles of nitrogen fixing bacteria in certain Decomposers In the nitrogen cycle
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Which of the following is an example of the endocrine system maintaining homeostasis? Detecting a pain stimulus and sending a signal to the spinal cord to perform an auto
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Suppose a laboratory Wants to identify an unknown pier substance the valance electrons of the substance Adams feel an effective nuclear charge of +4 is the owner of substance was a higher electronegat
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Suppose a student analyzes an unknown tablet as described in the experiment procedure and the absorbance of the resulting solution 3 is determined to be 1.250. What might the student do in order to de
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What information can scientists determine from drilling out and examining samples from the interior of the cypress trees found in the underwater forest? (check all that apply) Information about ancien
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H2o is the chemical formula for water. in order to produce a single molecule of water, how many hydrogen atoms are needed?
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Draw the mechanism for the conversion of 3-sulfolene into 1,3-butadiene, then the mechanism for the cycloaddition of 1,3-butadiene with maleic anhydride.
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Did the flame color differ when using the cobalt glass in identifying the flame color of sodium and ptassium solutions
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Determine the equilibrium concentrations for Pb2+ and Cl- if you initially have 0.750 grams of PbCl2 (s) and 0.10 M Cl- in a volume of 0.500 L.
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Calculate the theoretical yield of ammonia produced by the reaction of 100g of H2 gas and 200g of N2 gas
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The diels–alder reaction occurs primarily in an endo, rather than an exo, fashion when the reaction is kinetically controlled
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If the activation energy required for a chemical reaction were reduced, what would happen to the rate of the reaction
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Use the equation. How much SiCl4 is needed to produce 2.7 moles HCl? SiCl4 + 4 H2O --> H4SiO4 + 4 HCl
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You preformed this experiment using air which we know is a mixture of several gasses. would the results of this experiment be imporved if we used a sample of pure nitrogen
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Please really i need a short report about group16 elements that contain this1 propertie,2 simple copmound of hydrides,halaidoxideshydroxides ??
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Draw the unique stereoisomers for 1,2-difluorocyclohexane. show stereochemistry clearly. to ensure proper grading, explicitly draw all four groups, including wedge/dash bonds, around a chirality cente
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A reaction is followed and found to have a rate constant of 3.36 × 104 M-1s -1 at 344 K and a rate constant of 7.69 M-1s -1 at 219 K. Determine the activation energy for this reaction.
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To convert sodium iodide from a solid to a liquid, what types of intermolecular forces must be overcome?
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The incomplete table below shows selected characteristics of gas laws. Name Variables Constants Equation ? ? ? PV = k Charles’s law ? ? V = kT ? Temperature, pressure ? P = kT Combined gas law Press
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3. An underground copper pipe is used to transport oil under a factory. It is very important that this pipe does not oxidize, so engineers use impressed current cathodic protection. a. Would zinc be a
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Click the "draw structure" button to launch the drawing utility. you have a sample of a compound of molecular formula c11h15no2, which has a benzene ring substituted by two groups, (ch3)2n― and ―c
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Which physical property is used to identify matter based on solubility? A. ability to evaporate B. volume C. ability to dissolve D. Mass
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A 13.0 kg iron weightlifting plate has a volume of 1650 cm3 . What is the density of the iron plate in g/cm3?
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A worker is holding a filled gas cylinder still. Which two sentences are true about the energy of the filled gas cylinder?
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What is the density in grams per milliliter of hand sanitizer gel if 25.0 ml of the gel has a mass of 22.4g?
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If I have 0.0275 moles of gas at a temperature of 75k and a pressure of 1.75 atmosphere what is the volume of the gas
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Which of these statements best explains how continuation of space exploration would benefit humans? (2 points) It would provide technology to improve life on Earth. It would prevent severe weather con
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In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)2(aq) + 2 NaBr(aq) PbBr2(s) + 2 NaNO3(aq) The molar mass of NaBr is 102.9 grams and that of NaNO3 is 85 grams.
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Select the correct location on the diagram. Ocean currents affect the climate of the landmasses they come near. Which of the following locations most likely experiences a warmer climate due to a near
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A solution is prepared by adding 500 ml of 0.3 m naclo to 500 ml of 0.4 m hclo. what is the ph of this solution?
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Acetic acid, ch3cooh, is a weak organic acid, pka 4.47. determine the position of the equilibrium for the reaction of acetic acid with nahco3, and draw the species that predominates at equilibrium.
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Identify the housing option that has the lowest maintenance cost a single-family home b condominium c mobile home or d apartment
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As you have seen in this lab, the density of water is near 1 g/cm3. Anything with a density lower than this will float in water, and anything with a higher density will sink. Imagine you are building
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Major groups of minerals include _____. oxides and carbonates ions and isotopes inorganics and halides silicates and magnetics
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Write the complete ionic equation and the Net ionic equation for: K2C2O4(aq)+Pb(OH)2(aq) -> 2KOH(aq)+PbC2O4(s)
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