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1. Determine how many grams of O2 are present when mass of a sample of Earth's crust is of 328({rm g})g ? Note down that O2 makes up 46.7(%) by mass of Earth's crust. Assume that you are titrating both 0.10 M Acetic Acid and 0.50 M Acetic Acid solution with 1 N sodium hydroxide. How would you expect a titration curve of both the solutions and what will happen if HCl is added to the H2O and sodium acetate buffer ?
Calculate the Mn of the polyisobutene if A 7.5g polymer sample found to discolor 3.4 mL of a 0.05 M solution of Br in CCl4 ?
calculate how much CaCN2 is required to form 12.6 moles of ammonia? Given that the percent yield is 65.8%?
Sketch Flow diagram and explain the extraction process - What is the purpose of extracting the organic layer with water in the first extraction step?
What is the importance of chemistry to agriculture, Write summary of total one page and include references as well.
Find out the required pressure to compress 180 liters of N at 1.0 atm into a tank whose volume is 34 liters.
Calculate how much heat is required to added or removed to convert 100.0 g of steam at 115 0C to liquid water at 65 0C?
Estimate the ratios of the basic and acidic forms of the histidine side chain
A sample of 2.376 g ether (The compound known as diethyl ether [(C2H5)2O], commonly referred to as ether, contains carbon, hydrogen, and oxygen) was combusted in an oxygen rich environment to produce 2.887 g of H2O (g) and 5.643 g of CO2 (g).
Calculate the rate constant for the reaction when the reactant concentration in a first-order reaction is given 7.30×10-2M after 15.0s and it is also reported 4.40×10-3M after 65.0s . ?
Determine the partial pressure of each gas in a mixture of gases using Dalton's law of partial pressures
Which graduated cylinder would have the greatest volume change if equal masses of Au and Pt are transferred to equal volumes of H2O in separate graduated cylinders? Density of gold = 19.31 g/cm3 , density of platinum =21.43 g/cm3
How much would an empty volumetric flask, (weighing 27.16 grams, has a volume of 100.4 cm3 ) weigh when filled with bromine, an element that has a density of 3.1028 g/cm3.
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