Chemistry

Are compounds of these ground-state ions paramagnetic?(a) Ti (b) Zn (c) Ca (d) Sn
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In the laboratory you are asked to make a 0.303 m cobalt(II) sulfate solution using 275 grams of water. How many grams of cobalt(II) sulfate should you add?
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6. {THROWBACK!!) A sample of CO2 gas has a volume of 145 Lat STP. How many grams of CO2 are in this sample?
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How many joules are required for melting 12.8g of ice at 0 degrees Celsius?
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What mass of Na2CrO4 is required to precipitate all of the silver ions from 73.6 mL of a 0.150 M solution of AgNO3?
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Express your answer as a balanced chemical equation. Identify all of the phases in your answer.1. Li(s)+N2(g)Li3N(s)2. TiCl4(l)+H2O(l)TiO2(s)+HCl(aq)3. NH4NO3(s)N2(g)+O2(g)+H2O(g)4. Ca3P2(s)+H2O(l)Ca(OH)2(aq)+PH3(g)5. Al(OH)3(s)+H2SO4(aq)Al2(SO4)3(aq)+H2O(l)6.AgNO3(aq)+Na2SO4(aq)Ag2SO4(s)+NaNO3(aq)7. C2H5NH2(g)+O2(g)CO2(g)+H2O(g)+N2(g)
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A single penny is 1.52 mm thick. The distance to the next nearest star other than our own (Alpha Centauri) is 4.22 light-years. If it were possible to stack one mole of pennies, how many times would the stack go between the earth and Alpha Centauri? Use the unit factoring method to determine the answer and show your work. You will need to find or look up the appropriate conversion factors to solve the problem. Your answer should be in scientific notation and have the correct number of significant figures in order to get full credit. (Please note that the text editing functions/buttons below for this essay question allows you to show exponents by using the button show as "x2"in the controls. To use it type the number followed by the exponent such as 104, highlight the 4 and hit the x2 button and you will end up with 104 as the result)
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How does geothermal energy help form rocks?
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A 4.00 gram sample of a solution of sodium chloride in water was heated until all the water had evaporated. The sodium chloride that remained weighed 1.22 grams. Calculate the percentage of water in the original 4.00 grams of solution.
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g Nitrogen in the atmosphere consists of two nitrogen atoms covalently bonded together (N2). Knowing that nitrogen is atomic number 7, what type of covalent bond holds those two atoms together?
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A student ran the following reaction in the laboratory at 600 K: COCl2(g) CO(g) + Cl2(g) When he introduced COCl2(g) at a pressure of 0.822 atm into a 1.00 L evacuated container, he found the equilibrium partial pressure of COCl2(g) to be 0.351 atm. Calculate the equilibrium constant, Kp, he obtained for this reaction.
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write with examples two conditions under which a double displacement reaction can proceed.
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Which contains the greatest mass of oxygen: 0.75 moles of ethanol ( C2H5OH ), 0.60 mole of formic acid ( HCO2H ), or 1.0 mole of water ( H2O )? Why?
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Magnetism easily separates what mixture?A). Sand and glassB). Sand and ironC). Sand and clayD). Sand and aluminum
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What feature of an orbital is related to each of the following quantum numbers?(a) Principal quantum number (n)(b) Angular momentum quantum number (l)(c) Magnetic quantum number (ml)
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Name the element described in each of the following:(a) Smallest atomic radius in Group 6A(16)(b) Largest atomic radius in Period 6(c) Smallest metal in Period 3(d) Highest IE in Group 4A(14)(e) Lowest IE in Period 5(f) Most metallic in Group 5A(15)(g) Group 3A(13) element that forms the most basic oxide(h) Period 4 element with filled outer level(i) Condensed ground-state electron configuration of [Ne] 3s3p(j) Condensed ground-state electron configuration of [Kr] 5s4d(k) Forms 2+ ion with electron configuration [Ar] 3d(l) Period 5 element that forms 3+ ion with pseudonoble gas configuration(m) Period 4 transition element that forms 3+ diamagnetic ion(n) Period 4 transition element that forms 2+ ion with a halffilled d sublevel(o) Heaviest lanthanide(p) Period 3 element whose 2- ion is isoelectronic with Ar(q) Alkaline earth metal whose cation is isoelectronic with Kr(r) Group 5A(15) metalloid with the most acidic oxide
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A liquid is added to a buret, and the initial measurement is found to be 0.75 mL. After liquid has been added to the flask from the buret, the buret reads 15.20 mL. How much liquid (in mL) was dispensed from the buret, with the correct number of significant figures?
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Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1." C 4 H 10 + O 2 CO 2 + H 2 O
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According to observations, the overall chemical composition of our solar system and other similar star systems is approximately (a) 98% hydrogen and helium, 2% all other elements combined; (b) 98% ice, 2% metal and rock; (c) 100% hydrogen and helium.
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Determine the point groups for a. Naphthalene b. 1,8-Dichloronaphthalene c. 1,5-Dichloronaphthalene d. 1,2-Dichloronaphthalene
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A 20.3 mass % aqueous solution of iron(III) chloride has a density of 1.280 g/mL. Calculate the molality of the solution. Give your answer to 2 decimal places.
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What part of a cell has a function that is similar to your skin's? What is that function?.
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__ H2O + ___02 _H2O2
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Analysis of a volatile liquid showed that it is 54.5% carbon, 9.1% hydrogen, and 36.4% oxygen by mass. A separate 0.345-gram sample of its vapor occupied 120. mL at 100.C and 1.00 atm. What is the molecular formula for the compound?
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