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Given below is a table ...on the right are the molarities and percent transmittance (at fixed path length and wavelength)Molarity, M % T0.18 65.10.41 48.90.66 28.1Unknown 54.6
For three known solutions and an unknown solution of a compound in water:
Which one of the following values is possible as the molarity of the unknown:
(a) 0.45 M (b) 0.71 M (c) 0.28 M (d) 0.64 M Give reasons.
1. What is the ph of a solution that results from adding 250 ml of .50 m naoh to 750 ml of .50 m hf? 2. What is the ph of a buffer composed of .035 m h2po4 and .65 m hpo4?
How many grams of CaCO3 are produced when you react 55.2 mL of 0.150 M Ca(NO3)2 with 0.655 g of Na2CO3? How many grams of Na2CO3 remain unreacted? How many grams of Ca(NO3)2 remain unreacted?
Three gases (8.00 g of methane,CH4 , 18.0 g of ethane, C2H6, and an unknown amount of propane,C3H8) were added to the same 10.0L- container. At 23.0 °C, the total pressure in the container is 4.10 atm. Calculate the partial pressure of each gas in..
What is the vapor pressure of SiCl4 (in mm Hg) at 23.5 C? The vapor pressure of SiCl4 is 100 mm Hg at 5.4 C and Delta H
what is a given and how much water must be mixed with concentrated hydrochloric acid to prepare 50 cubic cm of 6 molar hydrochloric acid solution?
When 13.0 g of the mixture is dissolved in enough water to make 500. mL of solution, the solution exhibits an osmotic pressure of 6.85 atm at 25°C. Determine the mass percentage of NaCl in the mixture.
Ascorbic acid (Vitamin C, H2C6H6O6) is a diprotic acid. In a laboratory exercise, a vitamin C tablet was analyzed by titration using 0.125 M NaOH(aq). On the average, it required 29.5 mL of the base to neutralize the acid in the one tablet. How ma..
The molar heat capacity of a compound with the formula C2H6SO is 88.0 J/mol-K. what is the specific heat of this substance.
what is the correct expression for computing the volume of gas at STP and determine What is the mass percent yield from 1.79 g of Sb in excess S, is obtained if 1.14 g of Sb 2 S 3 ?
Galactose is concentrated in a cell by a transporter driven by ATP hydrolysis. What is the ratio of ADP to ATP required to maintain a galactose concentration gradient of 100,000:1
A "little more" than 5 mL of a saturated solution of borax is transferred to the corresponding calibrated test tube and subsequently titrated with the standardized hydrochloric acid solution.
The first order reaction SO2CL2 yields SO2+ Cl2 is 10% complete in 80 min. How long would it take for the reaction to be 95% complete?
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