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Which statement best describes the types and locations of particles that make up the atom? A. The neutral-charged neutrons and positive-charged protons are found within the nucleus, and the negative-c
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If δh = -60.0 kj and δs = -0.400 kj/k , the reaction is spontaneous below a certain temperature. calculate that temperature.
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A standard solution is prepared by dissolving 10.6192 g of (nh4)2ce(no3)6 (548.23 g•mol-1, 98.75% purity) in dilute sulfuric acid. the resulting solution is quantitatively transferred to a 500.0-ml
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Based on ionic charge and ionic radaii given in table 12.3, the predicted coordination number for calcium atoms in cao would be:
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When an electron jumps from a high energy state to a lower state, what form does the emitted energy take? A) an emitted proton B) an emitted ion C) an emitted photon D) an emitted neutron
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Sort each of the molecular representations again, but this time identify which molecules will hydrogen-bond (hb) with water molecules and which will not.
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Compare and contrast active transport and passive transport. Include at least one similarity and one difference between the two processes.
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Krypton gas in an 18.5-L cylinder exerts a pressure of 11.2 atm at 28.2 0C. How many grams of krypton are present? The answer is supposed to be 702g but I get 8.24 g and I can't tell what I'm getting
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Which of the followimg is an example of a physical change but not a chemical change?A. A log gives off heat and light as it burns.B. A tree stores energy from the Sun in its fruit.C. A penny lost in t
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What term describes the state of matter in which the attractive forces between particles are the greatest?
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Iron combines with oxygen to form rust. Given the chemical reaction, how many grams of 4Fe + 3O2 would produce 10 kg of rust?
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Latanya Brown is a nine-year old African American who is hospitalized with acute sickle cell crisis. The pharmacist is preparing intravenous fluids for this patient. She adds 2 grams of potassium chlo
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When a 2.00-g sample of kbr is dissolved in water in a calorimeter that has a total heat capacity of 0.7271 kj·k–1, the temperature decreases by 0.460 k. calculate the molar heat of solution of kbr
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The chlorofluorocarbon ccl2f2 was once used as a refrigerant. what mass of this substance must evaporate to freeze 2 mol water initially at 20°c? (δhvap for ccl2f2 is 289 j/g; δhfus for solid ice i
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How many electrons could be held in the second shell of an atom if the spin quantum number ms could have three values instead of just two? (hint: consider the pauli exclusion principle.)?
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Cd(s) | cd2+(1.0 × 10-5 m) || cd2+(0.100 m) | cd(s) given that e°red = -0.40 v for cd2+/cd at 25°c, find e° and e for the concentration cell expressed using shorthand notation below. cd(s) | cd2+(
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A 55.0-g aluminum block initially at 27.5 ∘c absorbs 725 j of heat. what is the final temperature of the aluminum? express your answer in degrees celsius to one decimal place.
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Which of the following pairs of elements could possibly be found in the same group on the periodic table? A forms a 2+ ion; B is an alkaline earth metal. A is a noble gas; B forms a 1- ion. A has 3 va
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Which of the following pairs of elements could possibly be found in the same group on the periodic table? A forms a 2+ ion; B is an alkaline earth metal. A is a noble gas; B forms a 1- ion. A has 3 va
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types of reactions and predicting reactions
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Which type of mixture contains the largest particles? solution suspension colloid varies according to the composition of the mixture
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Which answer choice correctly describes why the isotope oxygen-18 (18O) is different from the isotope oxygen-16 (16O)? Its atomic number is different because it has two more neutrons. Its atomic numbe
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Which of the following environments would most likely allow the evolution of antibiotic resistant bacteria? A A home with one family and occasional use of antibiotic soaps B An airport with a very div
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An ancient copper coin was found to absorb 545.8 j of heat when the tempature increases 31.4+c. the specific heat of copper is 0.387 j/g+c. what is the mass of the copper coin?
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Why coordination compounds are called coordination compounds and why they are called complex? Why this names is given to them
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When 15.0 kJ of heat was absorbed by 1.00 kg of liquid dichlorodifluoro- methane, CCl2F2, the temperature rose from 26.1 °C to 51.0 °C a) What is the specific heat of the compound? b. What is the mo
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A magnuson act states that fisheries management officials must pay attention to protecting fish habitat. which of the following fishing techniques would be most destructive to fish habitat? A) Drift n
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Illustrate how the effect of dipole to dipole interaction between two molecules affect their boiling point
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Acetic acid is a weak acid that forms a salt with a strong base, NaOH. What kind of salt will be formed? acidic salt increasing the pH of the solution acidic salt decreasing the pH of the solution bas
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Potassium hydroxide, KOH, is considered a _____________ in an acid-base reaction because it ___________ a hydrogen ion to/from the other reactant.
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Sketch a graph of what the density of silver would look like if we had lots of samples of different masses and volumes.
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Which statement describes the acid found in vinegar (acetic acid)? It tastes bitter. It feels slippery. It changes red litmus paper to blue. It reacts with Mg to produce H2. It releases OH- in a so
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Which of the following is a reasonable ground-state electron configuration? 1s22s22p63s23p64s24d4 1s21p62s22p3 1s22s22p63s23p64s23d1 1s22s22p43s2
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What is the molar volume of a gas at standard temperature and pressure? A . 1.0 L B. 2.4 L C. 11.2 L D. 22.4 L
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If the measured voltage of the cell zn(s) | zn2 (aq) || ag (aq) | ag(s) is 1.37 v when the concentration of zn2 ion is 0.010 m, what is the ag ion concentration
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Give two real-life examples where changing the volume and/or the temperature of a gas results in a change in pressure
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Consider the reaction mg(s)+fe2+(aq)→mg2+(aq)+fe(s) at 47 ∘c , where [fe2+]= 2.80 m and [mg2+]= 0.210 m . part a what is the value for the reaction quotient, q, for the cell? express your answer n
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By how many volts will the potential of mg2+ ion-selective electrode change if the electrode is removed from
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Which pair of atoms forms the most polar bond? which pair of atoms forms the most polar bond? p and cl si and f si and cl p and f?
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Compare how heat flows during exothermic reactions and endothermic reactions. Explain what happens to the thermal energy of the surroundings in each case.
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read the article and write an essay
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A. Here is the balanced equation 5Sn^2+ + 2MnO4^- + 16H^+ → 5Sn^4+ + 2Mn^2+ + 8H2O B. 43.75 ml of permanganate is required to titrate a 0.6493 gram sample of tin. Calculate the molarity of the KMnO4
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Alfred wegener l is best known for what hypothesis? A. Plate tectonics B. Sea floor spreading C.continental drift D.subduction
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Ines naturally come out of my mind,and end up looking like bad cursive. As they juggle knives for a deadly purpose, entertaining service, recursive You see suicide rates going up on a daily basis Get
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For a stoichiometric adiabatic laminar premixed propane flame with single- step global kinetics propagating through a gaseous mixture of fuel, oxygen, and nitrogen, how does the reaction rate R vary w
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this the article and write an essay.
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If the combined mass of two objects increases by a factor of 10, how will Fg be affected A.increased by 10 times B,increased by 100times C.increased by 1/10 times D.increased by 1/100 times
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Which astronomical body or a collection of astronomical bodies is likely to include the others listed? Comet Galaxy Solar system Universe
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Which of the following units is likely to be used while calculating the distance between Venus and Earth? Astronomical units Days Kilometers per hour Miles per second
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A 50 L cylinder is filled with argon gas to a pressure of 10130.0 kPa at 300°C. How many moles of argon gas does the cylinder contain? (Given: R = 8.314 L∙kPa/K∙mol) 2519.142 mol
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