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Explain a compound made up of C, H, and Cl contains 55.0 percent Cl by mass. If 9.00 g of the compound contain 4.19 * 10^23 H atoms, what is the empirical formula of the compound?
Hydrochloric acid (58.0mL of 0.235M) is added to 212.0mL of 0.0567M Ba(OH)_2 solution. What is the concentration of the excess H^+ or OH^- ions left in this solution
Consider a saturated colution of calcium oxalate, CaC2O4, in which the following reactions can occur: (CaC2O4)4 -2 (s) ---> Ca+2 + C2O4 -2 Ksp=1.3e-8
Choose the selection which correctly characterizes all three of the following substances in terms of whether they are polar or nonpolar
Determine the values for the equilibrium constants for the following reactions. (Hint: When reaction equations are added, the equilibrium expressions are multiplied.) (a) Na2O(s) + 1/2 O2(g) Na2O2(s) (b) NaO(g) + Na2O(s) Na2O2(s) + Na(l) (c) 2 NaO..
The density of a 0.0122 M KMnO4 is 1.037 g/mL. Suppose 26.35 g of 0.0122 M KMnO4 are required to titrate 1.072 g of a household H2O2 solution. Except for answers to (a) and (e), use scientific notation. Do not include units, just enter numerical v..
Three compounds, hexane, heptane, and an unknown molecule were separated using gas chromatography. The adjusted retention times were 10.4 min for hexane,
Define a sample of gases contains a mixture of 10 moles of He and 20 moles of Ne. The total pressure is 18 atm. Explain what is the partial pressure of He
Compute the a)molarity of the solution, b)molality of the solution, c) mole fraction of Ammonia.
A perfect gas is subject to expansion at a constant temperature, which increases its volume by 1.8 dm3 .The final pressure and volume of the gas are 124 Torr and 4.14 L, respectivley. Calculate the original pressure of the gas in a) Torr, b) bar, ..
Calculate the amount of PV work done. c2h4(g)+h2(g)-->c2h6(g) Express your answer using two significant figures. The addition of H2 to C=C double bonds is an important reaction used in the preparation of margarine from vegetable oils.
In a water molecule, two hydrogen atoms bind to one oxygen atom. How many lone pairs of electrons will be shown around each hydrogen atom in the Lewis structure of water
you have received three shipments of iron ores impure iron sampleof the following weights 2852 1578 and 1877 lbs. there
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