Chemistry

What happens to Cr3+ ion when itis converted to Cro42-
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How many joules are produced when 45 gram of copper is placed into water that releases them temperature from 12c to 71c (c)=0.75j/g*c
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The new-moon phase occurs when the Moon is positioned between the Earth and the Sun. However, these positions do not always cause an eclipse of the Sun because the *a. Moon's orbit is tilted relative to the Earth's orbitb. New-moon phase is visible only at nightc. Night side of the Moon faces toward the Earthd. Apparent diameter of the Moon is greatest during the new-moon phase
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(02.02 MC)How is Earth's surface most likely to change in a place that experiences strong sand storms?
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How many moles of H2 are needed to produce 18 moles NH3 in the reaction below?N2 + 3 H2 > 2 NH3
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If you decrease the amount of gas, what happens to the pressure? Explain WHY.
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As the temperature of a fixed volume of a gas increases, the pressure will _____. A. vary inversely B. increase C. decrease D. not change
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PbCl2+ AgNO3------>Pb(NO3)2+ AgClDecompositionSynthesisDouble displacementExothermic
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pH of a 0.00072 M HCl solution.
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How much would this compound weight
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An organelle found in plant cells,fungi and some protist, animal cells, and bacteria is the
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Students were provided with a sample of a pure element to examine. They made a list of its observable properties: solid at room temperature, shiny, malleable, and a good conductor of heat. Based on these properties, which element were the students most likely observing? *SulfurTinSiliconCarbon
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Which equilibrium describes a reversible reaction a short time after starting the reaction with reactants only?
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a) Balance the equation below. Hg(ONC)2 -----------> Hg + N2 + COb.) After decomposition, if you are left with 50.2g of CO, how many grams of mercury fulminate did you start with? (Hint: This problem asks about how many grams of reactant we start with, you can do the problem the same way as if CO was the reactant and Hg(ONC)2 was the product.)
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Fiona is examining a material. She notices that the material has a dull appearance and feels very brittle.Fiona is most likely examining a _______(I'll give brainliest)
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How many carbon and hydrogen atoms are there?
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When a radioactive atom emits an alpha particle, the mass number of the radioactive atomA. Increases because the alpha particle contains 2 electronsB. Decreases because the alpha particle contains 2 electronsC. Increases because the alpha particle contains 2 protonsD. Decreases because the alpha particle contains 2 protons
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which of the following is the most accurate description of all known spaces
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Do liquids have higher coefficients of expansion than solids do
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NEED HELP ASAP!!!!!!!!!!!!!!!Where will you encounter the least amount of life in the oceans?abyssal plains (the ocean's bottom)the beachthe top 200 meters of the oceaninter tidal zone
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What is the molariity of a 50.0 mL aqueous solution containing 10.0 grams of table salt, NaCl?
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PLEASE HELP!!!! How many moles of helium are needed to fill a balloon to a volume of 4.9 at 296K and 0.78 atm?
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How killers cover up their crimes
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If you start with 64g of a radioactive element how many half-lives would occur before 8g remain?
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