Chemistry

Rank the elements in each of the following sets in order of increasing IE: (a) Sb, Sn, I (b) Sr, Ca, Ba
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How is n1 in the Rydberg equation related to the quantum number n in the Bohr model?How is n1 in the Rydberg equation related to the quantum number n in the Bohr model?
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Waves interact with different surfaces in different ways. Waves often bounce off objects such as water. What is this form of wave movement called? A. refraction B. resonance C. reflection D. interference
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The diameter of a biscuit is approximately 51 millimeters (mm). An atom of bismuth (Bi) is approximately 320. picometers (pm) in diameter. Calculate the number of bismuth atoms needed to span the diameter of a biscuit in a line. Express your answer in scientific notation, showing the correct number of significant figures. (Enter your answer using one of the following formats: 1.2e-3 for 0.0012 and 1.20e+2 for 120. 1 m = 103 mm = 1012 pm)
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A 279.6 mL sample of an aqueous solution at 25C contains 91.6 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 8.44 torr, what is the molar mass (in g/mol) of the unknown compound?
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How many calories of heat are necessary to raise the temperature of 319.5 g of water from 35.7 Cto the boiling point?
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The addition of a ____________ group to butane increases the solubility of the resulting molecule in water.methylethyldouble bondhydroxyl grouppropyl
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To make the five standard solutions you will need for the Beer's Law Plot, you will first create a stock solution from ( NH 4 ) 3 Fe ( ox ) 3 3 H 2 O . The stock solution is made using 125 mg of ( NH 4 ) 3 Fe ( ox ) 3 3 H 2 O dissolved in deionized (DI) water in volumetric glassware for a total volume of 25 mL. Calculate the concentration of the stock solution.
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A is a homogenous mixture of particles so small they cannot be seen and will not settle to the bottom of their container. a. colloid c. suspension b. solution d. heterogenous
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EXPLAIN WHY THE AIR PRESSURE ON THE BEACH IN HAWAILISGREATER THAN THE PRESSURE ON TOP OF MAUNA KEA. (AVOLCANIC PEAK)
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why lead carbonate is not reacted with sulphuric acid in the formation of carbon dioxide
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Explain the difference between an endpoint and equivalence point in a titration
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If the amount of energy required to break bonds in the reactants is more than the amount of energy released in forming bonds in the products, then the reaction will have a negative change in enthalpy (H). TrueFalse
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What is the limiting factor in determining the accumulation of siliceous ooze/calcareous ooze, respectively?
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Write two different resonance forms for triphenylmethyl cation. Write the structure showing the positive charge at an ortho position.
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Calculate the concentration of OH-in a solution that has a concentration of H+ = 8.1 x 10^6 M at 25C. Multiply the answer you get by 1010 and enter that into the field to 2 decimal places.
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How many moles are in 250 grams of carbon dioxide gas
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How many grams of O2 are required for the complete reaction of 45.0g of CH4 to form CO2 and H2O?
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How many moles of NaCl will be produced from 83.0g of Na, assuming Cl2 is available in excess?
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Drag the tiles to the correct boxes to complete the pairs.Chromium is a transition metal, and oxygen has an oxidation number of -2. Use this information to match each compound to its chemicalformula.
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If a 2 liter container with an initial pressure of 2 atms is crushed to half its original volume what would its new pressure be in kPas
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A radio wave has a frequency of 3.8 x 10 Hz. What is the energy (in J) of one photon of this radiation?
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4. which answer below is the formula mass of a water molecule?a. 18.02 amub. 18.02 molesc. 18.02 gramsd. 6.02 x 102 molecules
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You wish to extract an organic compound from an aqueous phase into an organic layer (three to six extractions on a marco scale). With regard to minimizing the number of transfer steps, would it be better to use an organic solvent that is heavier or lighter than water
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