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For the reaction calculate how many moles of the product form when 0.036 mol of o2 completely reacts
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Chemistry
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If we titrate 10.00 ml of a .200 M HCl solution with NaOH, we find it requires 19.87 ml to reach the end point. Write the equation and calculate the experimental molarity of the NaOH base.
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Chemistry
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Potassium superoxide (KO2, 71.10 g/mol) can be used to generate oxygen gas. What is the theoretical yield of O2 (32.00 g/mol) if 500.0 g KO2 reacts with excess H2O (18.02 g/mol)?
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Chemistry
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If someone you know is very sensitive to acid foods, which foods would you recommend he or she avoid?
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Chemistry
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What is the balanced redox equation that results from the combination of the following half reactions
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Chemistry
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How many grams of solid sodium carbonate (Na2CO3, 106 g/mol) would be required to neutralize 1.0L of 1.0 M HCL
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Chemistry
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Balance the following equation. Then determine the ratio for the products KCl and O2 generated during the decomposition of potassium chlorate. KClO3 KCl + O2 1:1 2:2 4:3 2:3 3:2
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Chemistry
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If 18.16g of nacl is diluted to 200.0ml in a volumetric flask, what is the concentration of the solution in %w/v
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Chemistry
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How many grams of iron (III) chloride must decompose to produce 78.4 milliliters of iron metal, if the density of iron is 7.87 g/mL? Show all steps of your calculation as well as the final answer. FeC
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Chemistry
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A pendulum has 543 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing?
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Chemistry
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When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction caco3(s)→cao(s)+co2(g) how many grams of calcium carbonate are needed to produce 61.0 l of ca
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Chemistry
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What is the molarity of a 38.5% (v/v) aqueous ethanol solution? the density of ethanol (c2h6o, molar mass 46.07 g/mol) is 0.790 g/ml?
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Chemistry
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Hydrogen gas is produced when zinc reacts with sulfuric acid. zn(s) + h2so4(aq) → znso4(aq) + h2(g) if 157 ml of wet h2 is collected over water at 24°c and a barometric pressure of 740. torr, how m
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Chemistry
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A nail driven into a board increases in temperature. if we assume that 60% of the kinetic energy delivered by a 2.10-kg hammer with a speed of 7.90 m/s is transformed into heat that flows into the nai
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Chemistry
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How do you expalin the relativity high conductivity of tap water compared to a low o zero conductivity for distilled water
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Chemistry
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A student did not fill the tip of the buret with titrant before starting the NaOH standardization so the tip contained air when the titration was started
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Chemistry
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Molecule with central atom surrounded by 3 single bond pairs and 1 unshared pair would have what shape
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Chemistry
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Why is it important to have the correct bond angles of the different atoms and the shape of the molecule?
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Chemistry
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In each reaction box, place the best reagent and conditions from the list below. (a reagent may be used more than once.)
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Chemistry
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An electrochemical cell is constructed such that on one side a pure zn electrode is in contact with a solution containing zn2 ions at a concentration of 102 m. the other cell half consists of a pure p
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Chemistry
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Give another example of a scientific investigation that would require both observations and experiments
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Chemistry
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Draw fischer projection formulas for the products likely to be obtained from the bromination of (z)-2-hexene with br2/dichloromethane. identify the chiral centers with asterisks and label each center
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Chemistry
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What concentration of fe3+ is required to begin precipitation of fe(oh)3 if the ph of the solution is 3.48? ksp of fe(oh)3 is 2.79x10-39?
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Chemistry
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If you know the amount of the unbalanced force acting upon an object and the mass of the object, using Newton's 2nd Law what could you calculate about the object? A) acceleration B) friction C) inerti
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Chemistry
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The unit cell for xenon fluoride is given below. what is the formula? if the unit cell has a height of 702pm and a length of 432pm, what is the density (in g/cm3)?
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Chemistry
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In a hair sample drug test for cocaine that uses a G.C./M.S. , what is the stationary phase? I think the mobile phase would be Helium but l'm not sure about the stationary phase. If a research paper s
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Chemistry
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A 30.0 L container was filled by pumping into it 10.0 L of CO2 gas at 60.0 torr of pressure and 20.0 L of O2 gas at 50.0 torr of pressure. All volumes and pressures were measured at the same temperatu
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Chemistry
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A sample of CO2 gas with 10.0 L of volume and 60.0 torr of pressure is mixed with a sample of O2 gas with 20.0 L of volume and 50.0 torr of pressure, in a large container with 30.0 L of volume. What i
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Chemistry
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By the end of this lab, you will determine whether you should add cocoa mix (a solid) before or after heating water (liquid) to make hot chocolate. State a broad question about solubility whose answer
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Chemistry
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What is ΔG°rxn for the following reaction? 2NO(g) + Cl2(g) → 2NOCl(g) Substance ΔG°f (kJ/mol) NOCl(g) 66.35 NO(g) 86.55
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Chemistry
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Compared to a potassium atom, a potassium ion has A) a smaller radius B) a larger radius C) fewer protons D) more protons
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Chemistry
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When the equation Ca(OH)2 + HBr (products) is completed and balanced, one term in the equation will be
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Chemistry
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Assignment: Boiling and Melting Points Exploration Analysis and Conclusions 1. Looking at the line plots on your graph, describe how boiling point and melting point vary with respect to atomic number.
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Chemistry
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A sample contains 6.25 percent parent isotope and 93.75 percent daughter isotopes. If the half-life of the parent isotope is 58 years, how old is the sample?
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Chemistry
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What would happen to temperatures on the Earth if the Sun's heat were not distributed throughout the atmosphere?
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Chemistry
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What did rutherfords alpha scattering experiment suggested?c. all atoms are positively charged particlesd. the size of the atom is equal to the size of the nucleus
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Chemistry
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Chemical weathering occurs faster in warm, tropical climates, although it happens in cold climates as well. Describe some conditions in Antarctica that could lead to chemical weathering.
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Chemistry
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Find the pressure in mm Hg produced by 2.35g of carbon dioxide in a 5.00L flask at 18 degrees Celsius.
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Chemistry
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When you chew your food to break down the larger pieces into smaller particles, how are you helping to increase the rate of the chemical reactions in your body that breaks down your food?
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Chemistry
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In this experiment, you will first change the temperature of the water and determine its effect on the time it takes the tablet to dissolve. Then you will alter the size of the antacid tablet and dete
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Chemistry
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For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)? You do not need to look up any values to answer this question. Check all that apply. Check all that apply. H2O2(g)
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Chemistry
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What is the photon energy of light with a wavelength of 941 nm Note that h = 6.626 × 10−34 J·s and c = 3.00 × 108 m/s.
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Chemistry
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You are as a term of the identity of an unknown liquid and can measure only one physical property you heat the liquid and record that the liquid turns into vapor at 100 degrees C this demonstrates whi
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Chemistry
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Which of the substances below will have the greatest standard molar entropy? c4h10(g) c4h10(l) xe(g)?
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Chemistry
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We have learned that the lewis model portrays a chemical bond as the transfer or sharing of electrons represented as dots. valence bond theory portrays a chemical bond as the overlap of two half-fille
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Chemistry
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Which is a better emulsifying agent (which is better at helping water and oil mix), the soap or the detergent?explain
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Chemistry
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Qual a temperatura de um tanque com 253 g de nitrogenio com presão de 18mmhg e com um volume de 13,9m ao cubo . sabendo que sua maassa mecular é 28g
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Chemistry
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What must be the current in a 4.97-mh inductor, such that the energy stored in the inductor equals the energy stored in the capacitor?
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Chemistry
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The magnetic field in a charging capacitor when a capacitor is charged, the electric field e, and hence the electric flux φ, between the plates changes. this change in flux induces a magnetic field,
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Chemistry
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The half equivalence point in the titration of 0.100 m hco2h (ka = 1.8 × 10-4) with 0.250 m naoh occurs at ph = ________.
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Chemistry
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