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What is the mole fraction of Carbon Dioxide?
A. 0.0556
B. 0.0670
C. 0.2567
D. 0.6676
E. 0.7572
What is the mole fraction of Nitrogen?
A. 0.0568
B. 0.1673
C. 0.6675
D. 0.6111
E. 0.7333
What mass of CoCl3 is formed from the reaction of 3.478x10^23 atoms Co with 57.92L of Cl2 gas at STP?
Acetylene gas (C2H2), used in oxy-acetylene welding, reacts with oxygen according to the following equation:
2 C2H2 + 5 O2 ⇒ 4 CO2 + 2 H2O
f.w. 26.038 f.w. 31.9988 f.w. 44.010 f.w. 18.015
How many grams of acetylene were burned if 286.4 grams of CO2 were produced during the combustion reaction? (Please show the major steps of calculation)
(a) Briefly explain what you understand by phrase “homogeneity of the chloride level in a
water sample from a lake”
(b) Briefly explain how you would have done sampling in this study to obtain a set of
representative samples.
You mix 265.0 mL of 1.20 M lead (II) Nitrate with 300.0 mL of 1.55 M Potassium Iodide. The lead (II) Iodide is insoluble. Calculate (a)the final concentration of Pb2+ . (b) Mass of lead (II) Iodide (c) The final concentration of K+ (d) the final concentration of NO3-.
1.00 mL of a 2.90x10-4 M solution of oleic acid (C18H34O2) is diluted with 9.00 mL of petroleum ether (C6H14), forming solution A. Then 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming solution B. What is the concentration of solution B?
1.00 mL of a 2.90x10-4 M solution of oleic acid (C18H34O2) is diluted with 9.00 mL of petroleum ether (C6H14), forming solution A. Then 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming solution B. What is the concentration of solution B?
Calculate the boiling point of a 0.2 m aqueous sugar, C12H22O11 in ethanol.
A solution is made by pouring 125 grams of solute into 800. mL of solvent that results in 20.0 grams of solid solute sitting on the bottom of the container. What is the saturation point of this solution? 3 sigfig answer w/ g/L unit
