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The Practical rule is that a radioactive nuclide is essentially gone after 10 half-lives what percentage of the original radioactive new nuclide is left after 10 half-lives how long will it take for 1
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Design an experiment to collect data that supports the claim that a 0.25 M KCl solution is a homogeneous mixture. Describe the steps, the data you would collect, and how the data support the claim. La
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Consider the following three-step representation of a reaction mechanism. Step 1: A + B mc016-1.jpg AB (fast) and the rate = k[A][B] Step 2: AB + B mc016-2.jpg AB2 (slow) and the rate = k[AB][B] Step
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1.8g of organic compound on combustion give 3.21g of CO2, 1.322g of H2O.Calculate the empirical formula of the compound.
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When a 10 mL graduated cylinder is filled to the 10 mL mark, the mass of the water was measured to be 10.055 g at 20ºC. If the density of water is taken to be 0.9975 g/mL at 20ºC, what is the percen
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Which resonance structure of the phosphate anion, [po4 ]3−, is not equivalent to the other three? g?
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0.64 g of adrenaline in 36.0 g of CCl4 produces a bp elevation of 0.49 °C. What is adrenaline's molecular weight? Kb value for CCl4 is 4.95 °C/m.
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Thiamine pyrophosphate (tpp) is a coenzyme derived from vitamin b1 that is used by the enzyme pyruvate dehydrogenase to convert pyruvate to acetyl coa. tpp has a relatively acidic proton that can prod
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Employee training is also a requirement of HAZCOM program. When hazardous chemicals are present, you must be trained: A. Before you start an assignment for the first time B. Whenever a new physical o
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How much heat in joules is required to heat a 43g sample of aluminum from an initial temperature of 72˚F to a final temperature of 145˚F ? Special heat capacity for aluminum is 0.903 J/g˚C
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Imagine that you are Alfred Wegner travelling to a world science convention in order to explain your theory of continental drift to a panel of esteemed and respected scientists. Write an essay detaili
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If some impurities in a crucible are not burned off during the first step but are removed during the second heating, then will the mass of the anhydrous salt be too high or too low?
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You then collect the third product, analyze it, and determine that it has a formula mass of approximately 88 amu. what is the identity of this product?
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The dosage of quinine when a 145−lb adult takes a 200.−mg tablet is equivalent to _____ μg drug per kg of body weight. Please explain your steps.
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State the name of the radioactive isotope that has a half life that is approximately the same as the estimated time origin of earth
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Which words in the sentence make up the appositive phrase? There is a sale happening now for a popular holiday gift, tablet computers. A. tablet computers B. happening now C. There is a sale D. a pop
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What coefficients would balance the following equation? __C2H6 + __O2 → __CO2 + __H2O A. 1C2H6 + 5O2 → 2CO2 + 3H2O B. 2C2H6 + 5O2 → 4CO2 + 6H2O C. 2C2H6 + 7O2 → 4CO2 + 6H2O D. 2C2H6 + 10O2 →
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Reactant A can participate in both of these reactions: 1) A + B --> C + D ∆Grxn = –15.6 kJ 2) A + E --> F + G ∆Grxn = –20.5 kJ Reaction 1 has a much higher rate than Reaction 2 under the sa
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The graph below shows how solubility changes with temperature. What is the solubility of Na2HAsO4 at 60°C? 20 g/100 mL of water 46 g/100 mL of water 65 g/100 mL of water 70 g/100 mL of water
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While in Europe, if you drive 119 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 38.0 mi/gal ? Assume that 1euro=1.26doll
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Please help!? will vote brainliest All life that we know of is based on carbon. Carbon’s ability to form many chemical bonds is an important characteristic that allows it to form the basis of life.
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Marfan syndrome is a genetic disorder caused by a dominant allele. Describe how Marfan syndrome is inherited.
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During the preparation of a tertiary alcohol by a grignard reaction, the reaction mixture was shaken with saturated sodium chloride solution. what is the purpose of the saturated sodium chloride solut
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If 200.0 g of copper(ll) sulfate react with an excess of zinc metal, what is the theoretical yield of copper? 1.253g 50.72g 79.63g 194.3g
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For a more difficult training, football players in a training session have to push dummies that has an increased mass of 160 kg. If the players still push with a force of 150 N, what is the accelerati
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A rock has a mass of about 36,000 kg. If the acceleration due to gravity is 9.8 , what is the force that the rock is exerting on its pedestal? Please help, I'm super confused and it's due tomorrow. :
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The energy level diagram shown below represents a fictional gas. What is the energy of a photon that would move an electron from level 2 to level 5?
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Which profession is likely to use a radiation shield? A.)dentist B.)astronomer C.) mathematician D.)geologist
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During a kinetic study, a solution of aspirin in water was heated at 50 ⁰C. Samples (10 cm3 ) were taken every 10 minutes and titrated with a 0.15 mol dm-3 solution of potassium hydroxide. At t = 30
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A 75.0 g piece of gold(au) at 650 k is dropped into 180 g of h2o at 310 k in an insulated container at 1 bar pressure. calculate the temperature of the system once equilibrium has been reached. assume
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Which of the following pairs does not share the same empirical formula? C2H6 and C4H12 C3H6O3 and C2H4O2 C3H8O and CH2O C2H8 and CH4 Need explanation
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Classify each amino acid by the chemical properties of its side chain (r group) at ph 7. select the amino acid that fits best in each category. each amino acid will be used only once. 1. this amino ac
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Consider the values of the diffusion coefficients for the interdiffusion of carbon in both α-iron (bcc) and γ-iron (fcc) at 900°c. which is larger? explain why this is the case.
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The law of conservation of mass states that mass is neither created nor destroyed in an ordinary chemical reaction. when an iron nail rusts it seems to get heavier in mass. where does the mass come fr
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Attached document
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See document Files: E = SG Unit 3_Chemical Reactions Energy_PS 4_7 (3).doc Deadline: 2018-01-17 7:01 PM Posted by: Student138614 Price: $30.00Report spamSee documentSee documentFiles: E = SG Unit
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Sodium chloride comprises 97%-99% of table salt. Given their location on the periodic table, identify the ionic charge for each element and predict the chemical formula of the compound formed. A) Sodi
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Some one help me, pleas! This is the question:If 24.6 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 301 Kelvin and 1.01 atmospheres? 2Li (s) + 2H2O (l) y
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See document
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Ionic bonds form when there is an electrostatic attraction between oppositely-charged ions. In order to participate in this type of bond, the atoms must become ions by transferring which subatomic par
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A chemist in the lab wants to conduct an experiment with lithium and fluorine to see how they would react. Answer the following questions, clearly, correctly, and thoroughly:(1 pt) RECORD how many val
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In a clear, well organized paragraph and explain the connection between photosynthesis and cellular respiration. Include the reactants and products of both processes and explain how they are connected
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During a slapshot hockey puck takes 0.5 seconds to reach the goal it starts from rest and reaches the final velocity of 35 m/s what is the pucks acceleration
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Is a cubic meter (m3) equal to, different from , larger than ,or smaller than a cubic centimeter (cm3)?
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2TiO2 + 4Cl2 + 3C → CO2 + 2CO +2TiCl4 How many moles of chlorine, Cl2, will react with 4.5 moles of carbon,C? A. 3.4 mol B. 6.8 mol C. 6.0 mol D. 0.67 mol
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Large doses of vitamin C are supposed to cure the common cold. One commercial over-the-counter product consists of 500.0-mg tablets that are 20.0% by weight vitamin C. How many tablets should one take
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The equation for the formation of water from hydrogen gas and oxygen gas is 2H2 + O2 = 2H2O. How many grams of water can be made from 64g of oxygen gas? a) 405g b) 720g c) 180g d) 72g
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A sample is prepared by completely dissolving 10.0 grams of NaCl in 1.0 liter of H20. Which classification best describes this sample? a) homogeneous compound b) homogeneous mixture c) heterogeneous c
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Carbon-14 has a half-life of 5730 years. If the age of an object older than 50,000 years cannot be determined by radiocarbon dating, then A. carbon-14 levels in a sample are undetectable after undete
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