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The mass of a 0.106 mol of a compound is 6.366 g. What is the molar mass of this compound to three significant figures?
A cell composed of a platinum indicator electrode and a silver-silver chloride reference electrode in a solution containing both Fe2 and Fe3 has a cell voltage of 0.719 V. If the silver-silver chloride electrode is replaced with a saturated calome..
Calculate the pZn of a solution prepared by mixing 25.0 mL of 0.0100 M EDTA with 50.0 mL of 0.00500 M Zn2+. Assume that both the Zn2+ and EDTA solutions are buffered with 0.100 M NH3 and 0.176 M NH4Cl to provide a constant pH of 9.00.
The resultant mixture is then evaporated in a kettle to produce a jam contain- ing 67 wt % soluble solids. For a feed of 1000 kg crushed fruit, calculate the kg mix- ture from the mixer, kg water evaporated, and kg jam produced
What wavelength of radiation will be emitted when an electron in a hydrogen atom jumps from the n=5 to the n = 1 principal energy level. Name the region of the electromagnetic spectrum corresponding to this wavelength
what will be the volume of the blimp at a height of 2300 m, where the temperature is 12°C?
What are the coefficients in front of C2H6O and C2H4O when the equation given below is balanced. The reaction occurs in aqueous acid.
A chemist dissolves 128 mg of pure hydrobromic acid in enough water to make up of 110 mL solution. Calculate the pH of the solution.
Which components of an acrylamide gel effects qualities of the final product, and which components affect the speed of polymerization?
Calculate the molality of each of the following solutions. (a) 13.7 g of sucrose (C12H22O11) in 671 g of water m (b) 7.24 moles of ethylene glycol (C2H6O2) in 3808 g of water
When 7 mL of a solution containing 3 M KNO3 is diluted to 21mL, a dilute solution is formed. What is the NO3- concentration in 10mL of the dilute solution?
Assume a gasoline is isooctane, which has a density of 0.692 g/mL. What is the mass of 2.5 gal of the gasoline (1 gal = 3.78 L)? Answer in units of kg.
Which of the following materials will react with an acid to produce a gas. A) NaOH(aq) B) Na2CO3(aq) C) both (a) and (b) D) neither (a) nor (b) Which of the following materials will react with an acid to produce a gas
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