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A sample of an ideal gas has a volume of 3.30 l at 13.40 °c and 1.80 atm. what is the volume of the gas at 24.60 °c and 0.993 atm
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A reaction in which a→products was monitored as a function of time and the results are shown below.
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Draw the lewis structure for the sulfur dioxide so2 molecule. be sure to include all resonance structures that satisfy the octet rule.
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Draw a lewis structure for each compound. include all nonbonding pairs of electrons.(a) ch3coch2chchcooh (b) ncch2coch2cho (c) ch2chch(oh)ch2co2h (d) ch2chc(ch3)chcooch31-33 draw a line–angle formul
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Calculate the solubility (in m units) of ammonia gas in water at 298 k and a partial pressure of 8.00 bar . the henry's law constant for ammonia gas at 298 k is 58.0 m/atm and 1 bar=0.9869 atm.
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Capillary action: draws water from the soil to the surface helps the roots of plants obtain water is the upward movement of water between particles of soil all of the above
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Using the bond energies below, calculate an estimate of δhrxn for the hypothetical gas phase reaction: a-c≡n + b2 => b-c≡n + ab
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An object with a mass of 0.255 kg and density of 2.89 g/cm3 measures 34 mm in length and 46 mm in width. What is the height of the object?
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You wish to dispose of 25 ml of 70% phosphoric acid. where will you do so? select the one correct answer.
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0 ml of a 1.30 m solution is diluted to a volume of 258 ml. a 129-ml portion of that solution is diluted using 151 ml of water. what is the final concentration?
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Redict the major product formed when the compound shown below undergoes a reaction with one equivalent of br2 in h2o at a high temperature.
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Standard reduction potentials for zinc(ii) and copper(ii) the standard reduction potential for a substance indicates how readily that substance gains electrons relative to other substances at standard
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Which of the following statements is true? a. most metals cannot be stored in solid b. most metals cannot be stored in liquid form c. most metals cannot be stored in gaseous form. d. most metals can b
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A nurse practitioner prepares 450. mL of an IV of normal saline solution to be delivered at a rate of 90. mL/h. What is the infusion time, in hours, to deliver 450. mL?
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The insecticide DDT was introduced in the 19t0s, and the rates of malaria dropped significantly. DDT was later found to be toxic to birds and other animals, and it was discontinued in 1964. As a resul
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The teacher prpsres2.59 liters (L) of a salt solution fir a class experiment. How many quarts are in 2.50 L?
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___in Earth’s___ is the up and down movements of plastic-like material within that layer. A)conduction;crust B)convection;crust C)conduction;mantle D) convection;mantle
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Why does conduction occur in solids and liquids easier compared to gases? Question 9 options: Because the particles in gases are closer together and move faster. Because the particles in gases rarely
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A water initially contains 40 mg/l of mg2+. the ph of the water is increased until the concentration of hydroxide ion (oh) is 0.001000 m. what is the concentration of magnesium ion in this water at th
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Calculate the molarity of a solution that contains 20.275g calcium bromide dissolved in 575 mL of solution
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A 0.12 m (molal) solution of nacl in water has a freezing point which differs from that of pure water by 0.4oc. determine the expected freezing point difference of 0.06 m (molal) nacl in water.
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Write the balanced equation for the reaction first. Sulfur combines with iron to form iron(II) sulfide. In an experiment, 15.24 g of Fe are allowed to react with 17.34 g of sulfur What is the limiting
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F 2.0 g of copper(II) chloride react with excess sodium nitrate, what mass of sodium chloride is formed in this double replacement reaction? Write the balanced equation for the reaction first.
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The equilibrium of 2H 2 O(g) 2H 2 (g) + O 2 (g) at 2,000 K has a Keq value of 5.31 x 10-10. What is the Keq expression for this system?
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You need to dissolve cacl2 in water to make a mixture that is 42.0% calcium chloride by mass. if the total mass of the mixture is 815.7 g, what masses of cacl2 and water should be used?
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Write the molecular formula for a compound with the possible elements C, H, N and O that exhibits a molecular ion at M+ = 84.095 I understand the concept of adding together the specific mass C=12.000,
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From this map, determine the geometry for how two acetonitrile molecules would interact with each other.
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To help finance a major expansion, castro chemical company sold a noncallable bond several years ago that now has 20 years to maturity. this bond has a 9.25% annual coupon, paid semiannually, sells at
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The half life of the reaction is 1.60 × 105 s at 444 k. what is the rate constant when the initial [ch3nc] is 0.030 m?
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Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter?
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A novel apparatus has been constructed that is both a hot plate and an analytical balance to determine how the waters of hydration are driven off from a sample of a hydrate. In this experiment, a 0.82
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Which sentence characterizes enzymes in the human body? A. Most are made of starch. B. Most catalyze only one type of reaction. C. Most require an acid to work. D. Most are lipids.
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Approximately how many atoms make up 2.3 moles of gallium A) 1.6x10^21 B) 3.8x10^22 C) 2.3x10^23 D) 1.4x10^24
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Which term names elements that are usually shiny and good conductors of heat and electricity? A. gases B. metals C. solids D. nonmetals
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How does a homogeneous catalyst compare with a heterogeneous one regarding the ease of recovery of the catalyst from the reaction mixture?
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The average volume of blood plasma in adults in 3.1 liter density = 1.03 g/ml. approximately how many grams of blood plasma are there in the average adult body ?
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After a few days, it is time to depart Cape Town and fly to Paris, a distance of 9,306 km. You take your Dassault Falcon 2000LXS jet, which cruises rather effortlessly at 450 knots. If 1 knot = 1.1508
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Can someone help me with drawing the lewis structure of (CH3)2CHCH2OCH2CH3? I've done it twice already and it still says it is incorrect. I don't see the problem and I'm about to quit. Here is a pictu
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3.6 grams of salt will dissolve in 10 grams of water. How many grams of salt will dissolve in 1000 grams of water?
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How many grams of methane gas (CH4) are in a 15.8-liter sample at 1.2 atmospheres and 27°C? Show all work used to solve this problem.
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Consider the balanced equation. PCl3 + 3H2O mc032-1.jpg H3PO3 + 3HCl What is the percent yield of HCl if 42.0 g of HCl are produced from the reaction of 62.0 g of PCl3?
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Create a scale for your model thermometer. Divide the distance between the two marks into 5-mm intervals. Starting with the lowest point, label the intervals on the straw 0, 1, 2, 3, and so on. Descri
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What is the freezing point of a solution prepared from 50.0 g ethylene glycol (c2h6o2) and 85.0 g h2o?
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The heat of formation of fe2o3(s) is -826 kj/mol. calculate the heat of the reaction for 4fe(s) 3o2 (g) → 2fe2o3(s) when a 55.8-g sample of iron is reacted. answer: δh of reaction
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Sodium hydroxide is used extensively in acid-base titrations because it is a strong, inexpensive base. a sodium hydroxide solution was standardized by titrating 30.65 ml of 0.1159 m standard hydrochlo
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0 ml of 0.120 m naoh is added to 565 ml of 0.200 m weak acid (ka = 8.25 × 10-5). what is the ph of the resulting buffer?
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High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen. determine the concentration of cl (in wt%) that must be added if this substitution occu
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Calculate the concentration of the lactate ion in a solution that is 0.100 m in lactic acid (ch3ch(oh)cooh, pka = 3.86) and 0.080 m in hcl.
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Calculate the freezing point of a 2.5 m aqueous sucrose solution. (Assume that Kf for water is 1.86∘C/m.)
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Acetone is a common solvent and has a density of 0.7899 g/ml. What volume of acetone in ml has a mass of 28.6g
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