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A solution of ammonia and water contains 1.40×10^25 water molecules and 5.30×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
Discuss the importance of economics as it relates to pollution prevention. Supple at least two seperate examples to augment your discussion.
Determine the molarity of a solution that is formed by dissolving 21.0 g of CaF2 in a flask and adding water to make 446.2 mL of solution
A 59.0-g sample of an alloy at 93.0°C is placed into 264 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup.
the specific heat of ethylene glycol is 2.42 J/g-K. How many J of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1 C to 40.5 C ?
What is the molality of CrCl3 in a solution prepared by dissolving 75.2 g chromium(III) chloride hexahydrate in 250.0 g of water.
A pure gas sample at room temperature (25 C) has an average molecular speed of 682 m/s. What is the identity of the gas.
How much water must be added to 488 mL of 0.223 M HCl to produce a 0.134 M solution?
The amount of heat needed to raise the temperature of 25 g of a substance by 15°C is 915 J. What is the specific heat of the substance?
Light with a frequency of 7.11 x 10 -14 Hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light? Answer in units of nm.
The percentage natural abundances of 39k and 41k are 93.2581% and 6.7302%, respectively. find out the isotopic mass of 41k.?
A 5.0 mL sample of vinegar was titrated with 7.2 mL of 0.55 M NaOH(aq). If the density of the vinegar solution is 1.00 g/mL, what is the mass percent of acetic acid present?
The distribution coefficient, k = (conc. in hexanes/ conc. in water), between hexanes and water for solute A is 7.5 . What weight of A would be removed from a solution of 10g of A in 100mL of water by a single extraction.
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