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1. To prepare a solution of NaCl (MW 58.443 (+-0.001), you weigh out 2.634 (+- 0.002) g and dissolve it in a 100-mL volumetric flask (+ -0.08 mL). What is the correct expression for the molarity of the solution? (Be sure to express your answer to the correct number of significant figures and also show the absolute uncertainty.)
2. In a titration, you use a digital titrator with very high accuracy and dispense 34.092 (+- 0.005) mL of a HCl solution that is 0.0104 (+- 0.0002) M. How many millimoles of HCl were added to the solution? (Be sure to express your answer to the correct number of significant figures and show the absolute uncertainty.)
The bromocresolgreen end point of the titration was reached after the addition of 30.00 mL of hydrochloric acid solution. Calculate the concentration of the acid solution.
What is the concentraion of toulene in this sample? Does this exceed the standard? (maximum contaminant level is 1.0 mg/L 6) How much calcium nitrate has to be added to 1000L of solution to provide 130ppm Ca^2+ if the water supply contains 40ppm Ca..
Calculate the initial volume of a sample of a gas if its final volume is 344 mL after being heated from -10 °C to 40 °C.
Formulas and constants to remember R = 1.98 cal/degree-mole ; Delta G0 = -RT lnKeq. T = 298 degrees K. How much NADH will be produced in the above reaction
calculate the composition of the vapor (in terms of mole fractions) at 25°C. At 25°C, the vapor pressures of pure CH2Cl2 and pure CH2Br2 are 133 and 11.4 torr, respectively.
If 0.0050 mol of methyl acetate is dissolved in 10.0 grams of tert-butanol, what is the expected freezing point depression in celcius degrees?
Acetylene gas (C2H2) is produced as a result of the reaction CaC2(s) + 2 H2O(l) → C2H2(g) + Ca(OH)2(aq).
consider the following equilibrium system H2(g)+ Br2(g)=2HBr(g) Keq= 14.8 A closed container is initially filled with equal moles of H2 and Br2.When equilibrium is reached the (HBr) is 0.329 mol/L What is the initial (H2)
Separating the components of a ternary mixture. (Chemistry lab) Could you separate the components of a mixture of Mg(OH)2 and Zn(OH)2 by using 3M HCl?
chromium oxide is made by reacting Na2Cr2O7 with ammonium chloride to make chromium III oxide, sodium chloride, nitrogen and water.
to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
If the pistons in the four cylinders are each displaced with a pressure of 1.52 kbar and each cylinder is ignited once per second, how much work can the engine do in 1.00 minutes?
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