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This is a steel penny from 1943. A steel penny will weigh 2.72 g and ismagnetic. This penny weighs 2.74 grams and sticks to a magnet. Therefore,this is likely a steel penny. Identify the RULE in this claim, evidence andreasoning
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An eccentric chemistry professor (not mentioning any names) stops in every day and orders 250ml of Sumatran coffee at precisely 60.0C. You then need to add enough milk at 3.00C to drop the temperature of the coffee, initially at 80.0C, to the ordered temperature.Calculate the amount of milk (in ml) you must add to reach this temperature. Show all your work in the provided spaces.In order to simplify the calculations, you will start by assuming that milk and coffee have the specific heat and density as if water. In the following parts, you will remove these simplifications. Solve now this problem assuming the density is 1.000 g/ml for milk and coffee and their specific heat capacity is 4.184 J/(g C).
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what element has the symbol of He
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The genome map with details for gene 4 on chromosome 6 _____.is very complicated, medically important, and cannot be sharedlike the rest of the genome, is still not complete and has not yet been publisheddue to criminal fraud, must be kept secret from both the general public and scientistshas been made available to both the scientific and private communities of the world
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You have 17 liters of gas at STP. If the temperature rises to 94C and while the volume decreases to 12 liters, what will the new pressure be?
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How many moles are equal to 13.2 L of NFCI3 gas at STP? Need the equation
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You titrate 25.00 mL of the lemon-lime Kool-Aid (with KI, HCl, and starch) with 0.001000 M KIO3(aq) solution. The titration requires 10.19 mL of KIO3(aq). Determine the number of moles of ascorbic acid in 25.00 mL of your Kool-Aid solution.
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How many formula units of CaO are in 32.7 g of CaO?A) 0.58 formula unitsB) 1.96 x 1025 formula unitsC) 56.08 formula unitsD) 3.51 x 1023 formula units
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How many mole of calcium (Ca) are in 9.00 x 1016 atoms of Ca?
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The bigger the magnitude , the bigger the Earthquake
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Which of the following has the strongest gravitational field?A. the sunB. the earthC. a football playerD. a tree
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The science that studies the impact of atmospheric smog on genetic expression, causing cancer and other diseases such as asthma, is called _____.bioinformaticsbiotechnologyepigenomicsmolecular biology
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The database used for the identification of victims of earthquakes ____.would be the same as that used by the countries' forensic scientistscould be compiled from that database found on the Human Genome Project siteneeds the identities and profiles of possible victimswould not need to include more profiles than that used for known criminals
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please help asap :)))))
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Which of the following sources could not be used to obtain the DNA of a person lost in a mass disaster? used and unwashed clothing or bed sheets food found in the victim's refrigerator sunglasses regularly used by the person a toothbrush used by the person
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Which of the following body organs is involved in helping the body keep its balance? O lungs O nose O ears O eyes Please answer quick
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Give one hazard of using sodium hydroxide and state how to reduce the risks from this hazard.
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Cromium and tantalum both have the BCC crystal structure, and Ta forms a substitutional solid solution for all concentrations at room temperature. Compute the unit cell edge length for a 26 wt% Cr - 74 wt% Ta alloy. The room-temperature density and atomic weight of Cr are 7.19 g/cm3 and 52.00 g/mol, the room-temperature density and atomic weight of Ta are 16.6 g/cm3 and 180.95 g/mol, respectively.
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A proton transfer reaction can occur when a carbonyl compound is placed in an aqueous acidic solution.a. Trueb. False
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You explored the relationship between molarity, the number of moles, and solution volume. However, when you prepare a solution, you are unable to directly measure the number of moles of solute. Instead, you can mass the solute and convert between the number of moles and mass using the molar mass of a substance as a conversion factor. The molar mass of a substance can be calculated based on its molecular formula; otherwise, it can be calculated from the mass and number of moles as follows: Molar Mass = Mass solute (in g)Moles solute In order to prepare a certain volume of solution with a desired concentration, you would need to determine the required mass of solute. What mass of CaCl2 would you need to prepare a 100. mL solution at a concentration of 0.240 M ? Express the mass in grams to three significant figures.
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The crocodile which can remain underwater without breathing for up to an hour, drowns it air-breathing prey and then dines on them at its leisure. An adaptation that aids the crocodile in doing so is that it can utilize virtually 100% of the O2 in its blood whereas humans, for example, can extract only -65% of the O2 in their blood. (a) Draw an O2 binding curve comparing crocodile hemoglobin to that of normal hemoglobin. humne ih (b) Experiments have demonstrated that 2,3 bis-phosphoglycerate has no effect on the O2 binding of crocodile hemoglobin. However, it has been shown that 2 molecules of bicarbonate bind to deoxyhemoglobin tetramers but not to oxyhemoglobin tetramers of crocodile hemoglobin. Describe how bicarbonate might effect the O2 affinity of crocodile hemoglobin. Make sure to detail what regions of the hemoglobin tetramek might be bound by bicarbonate and how this would influence structural changes in the crocodile hemoglobin that would, in turn, affect O2 affinity. (c) Sketch the biochemical reactions in red blood cells that result in bicarbonate formation in venous blood. Write balanced equations and identify any enzymes that might be involved. If an enzyme is required, indicate which reaction is enzyme-catalyzed.
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What is the mass of 1.70 mol of carbon-12?Select one:O20.49O0.140 gO12.0 g7.069
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How many grams are in 21.7 mol of H2O?
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Which represents the overall (net) reaction of this mechanism: step 1: H2O2 + I- H2O + OI- step 2: H2O2 + OI- H2O + O2 + I- Note that I- acts as a catalyst in this reaction. A. 2H2O2 2H2O + O2 B. H2O2 H2 + O2C. H2O2 + I- OI- + H2O D. H2O2 + OI- H2O + O2 + I-
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