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Lead is malleable, So it can be pounded into flash eat without breaking. How does the bonding within lead help text me in this property?
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read this article first and fill up the next page.
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What is the molar concentration of the HNO3 solution resulting from mixing 5.0mL of 3.5 M HNO3 and 95mL of 0.20 M HNO3?
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Assuming that the smallest measurable wavelength in an experiment is 0.550 fm (femtometers), what is the maximum mass of an object traveling at 297 m·s–1 for which the de Broglie wavelength is obse
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Dan wants to test the effects of different amounts of antibiotics on bacteria. While setting up his experiment, he makes sure to use the same type of antibiotic, the same type of bacteria, and the sam
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In which of the following pairs of salts will both members of the pair hydrolyze in water to give solutions that are basic? A. NaC2H3O2 and NaF B. LiCl and NaCN C. NH4Cl and NH4NO3 D. KNO3 and Li2SO4
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A chemist takes 50-gram sample of sulfur powder that has a melting point of 115.2 °C. What is the melting point of a 100-gram sample of sulfur powder?
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Desalinization plants remove the salt from sea water and make it usable for drinking and irrigation. Review the following statements and select the one that best describes how this technology has had
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A scientist in Japan and a scientist in Germany both conducted independent investigations that produced similar results. What does this mean about the data that was collected? A) The scientists will h
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___Fe + ___O2 →___Fe2O3 Your old bike left out in the rain starts to rust. What coefficients fill in the blanks to balance the equation? A) 1,2,3 B) 2,3,1 C) 2,3,2 D) 4,3,2
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A large mass of hardened igneous rock extending from beneath all layers of sedimentary rock is a: sill batholith laccolith
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A solution containing 28% acid is to be mixed with a solution containing 40% acid to make 300 gallons of a solution Containing 36% acid. how much of each solution should be used
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Heather is testing a substance as to whether it is organic or inorganic. She works with the solid substance and discovers it can conduct electricity without burning. She also knows the carbon to oxyge
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Which statement is true for a cooling curve? A.) It shows how the temperature of the substance falls as heat is removed. B.) It shows how the temperature of the substance changes when heat is applie
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What is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase?
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How much 10.0 m hno3 must be added to 1.00 l of a buffer that is 0.0100 m acetic acid and 0.100 m sodium acetate to reduce the ph to 5.45 ?
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Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 oc. what is the vapor pressure of ethanol at 16.2 oc?
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A mixture of oxygen gas, nitrogen gas, and carbon dioxide in a 10.0 l container at 25 oc has a total pressure of 12.5 atm. if there are 30.0 g each of oxygen and nitrogen, how many grams of carbon dio
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A graduate student working toward a PhD in Chemistry discovers an efficient, powerful redox reaction involving an uncommon combination of chemicals. In order to show other chemists the voltage generat
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Based on the definition of specific heat and the information provide below, if the same amount of heat is added to 1 kg of all these substances, which substance will raise in temperature to the highes
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How many unpaired electrons are present in the ground state of an atom form each of the following groups? (a) 2A (b) 5A (c) 8A (d) 3A
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Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing filtration sorting
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I'm stuck, I need answers. Hydrogen covalently bonds with oxygen to form the compound water. Oxygen becomes MORE chemically stable because A) Hydrogen transfers an electron from oxygen to fill it's o
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Give the complete balanced equation for the reaction that occurs when lithium carbonate (Li2CO3) is heated
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Lithium is a metal with an oxidation number of 1+ and oxygen is a nonmetal with an oxidation number of 2-. Which chemical formula represents the compound formed by these two elements? A) Li2O B) Li3O
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Which of the following is a nonrenewable energy source? A. coal B. solar C. wind D. hydropower E. burning biomass
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If you had a mixture of small glass bends and large glass beads which method could you use to seperate the two sizes of beads?
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Precipitation at a rate of 2cm/yr how long will it take for a 0.5 m layer to accumulate
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If you were to use lewis theory to predict the formula for the compound between sulfur and aluminum, it would most likely be
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A mixture is prepared using 25.00 ml of a 0.0828 m weak base (pka = 4.576), 25.00 ml of a 0.0621 m weak acid (pka = 3.230) and 1.00 ml of 0.000107 m hin and then diluting to 100.0 ml, where hin is the
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What is the half-life (in seconds) of a zero-order reaction which has an initial reactant concentration of 0.854 m with a k value of 5.42 × 10–2 m/s?
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A 10 ml sample of HNO3 was diluted to a voulme of 100 ml then 25 ml of that diluted solution were needed to neutralize 50 ml of .60 M KOH what was the concentration of the original HNO3 soulution
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Which molecule would have the highest boiling point? which molecule would have the highest boiling point? ch4 ch3f?
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Another component of acid rain is nitric acid, which forms when NO2, also a pollutant, reacts with oxygen and water according to the simplified equation 4NO2(g)+O2(g)+2H2O(l) → 4HNO3(aq) The generat
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It is estimated that in Florida alone, almost 4,500 deaths occur annually due to __________ use. A. alcohol B. drug C. cocaine D. None of the above
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Carbon monoxide prevents __________. A. the breakdown of other chemicals in the liver B. fuel from igniting at the wrong time C. the blood from carrying oxygen to the tissues of the body D. All of the
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Which of the following is a example of passive nuclear safety inrespo se to failure of electric coolant pumps in a nuclear power plant
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Which of the following statements is true? A. Only objects that are very close together exert gravitational forces on each other. B. Only objects that are as large as planets exert gravitational force
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Which of the following best describes the forces when there are different-sized forces from opposite directions acting on an object
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A radioactive nuclide that is used to label blood platelets has 49 protons and 62 neutrons. Which is the symbol of this nuclide?
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Consider the balanced chemical equation, MgCl2(aq) + 2AgF(aq) → 2AgCl(s) + MgF2(aq) If both reactants are completely consumed and we produce 20 formula units of AgCl, how many ions of Mg and F did w
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This synthesis was designed using the organic chemistry road map found in appendix 11 of your textbook. in this synthesis, reagents from the table are used to carry out the indicated steps (shown in b
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Why was it necessary to reduce the volume of your reaction mixture after the addition of sulfuric acid?
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A key step in the extraction of iron from its ore is feo(s) + co(g) ↔ fe(s) + co2(g) kp = 0.403 at 1000°c. this step occurs in the 700°c to 1200°c zone within a blast furnace. what is the equilib
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A thermometer that was used in a calorimeter was consistently 2.7 °c too high. how would this affect the calculations of δh for the reactions conducted in the calorimeter?
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Write lewis structure that obeys the octet rule for socl2 (s is the central atom) and assign formal charges to each atom.
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Which alkyl bromide reacts fastest with silver nitrate in ethanol: butyl bromide, sec-butyl bromide, or tert-butyl bromide? which reacts slowest? explain how structure affects the rate in the sn1 reac
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How would you explain what happens to the particles during melting and dissolving to someone who is confused
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What idea of Darwin’s based on fossils and the modern organisms he found basically says that genetic changes are inherited by later genes rations
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Study the map and cross section. There are five rock layers shown, A through E. Color each layer a different color. Use the letters in the layers to help you. Sediments are almost always deposited in
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