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1. Approximately 80% of the mass of a human body consists of aqueoussolutions (spinal fluid, blood, etc.) These solutions areunsaturated salt solutions that are 0.21 M NaCl and have a densityof 1 g/mL. How many pounds of salt are present in an 180 lb adult?
2. Zinc dissolves in hydrochloric acid to yield hydrogengas:Zn(s) + 2HCl(aq) ? ZnCl2(aq) + H2(g)
Calculate the mass of hydrogen gas produced when a 7.35 g chunk ofzinc dissolves in 500. mL of 1.200 M HCl?
3. Ammonium nitrite undergoes decomposition to produce only gases asshown below.NH4NO2(s) ? N2(g) + 2H2O(g)
How many liters of gas will be produced by the decomposition of32.0 g of NH4NO2 at 525?C and 1.5 atm?
What mass of solid sodium formate (of MW 68.01)must be added to 115 mL of 0.57 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 4.16? Ka = 0.00018 for HCOOH.
Work function of chromium metal is 4.37 eV. What is the wavelength of radiation that must be supplied to metallic chromium to release and electron with kinetic energy of 2.05*10^-18 J
Write the structural formula and other name of a) 2-bromo-3,3-dimethylhexane b) 3,3-dimethyl-1-heptyne
If in a decompositionreaction, one sample of magnesium fluoride produced 1.66kg of magnesium and 2.58kg of fluorine. A second sample produced 1.27kg of magnesium.How much fluorine (in grams) did the second sample produce
Calculate the and the concentrations of all species present (H3O+,F-, Cl-,and OH-) in a solution that contains of HF 0.19 M (Ka=3.5*10^(-4)) and 0.19 M of HCl.
a throttling valve has inlet conditions of saturated vapor r-134a at 600 kpa exits at 240 kpa. the kinetic energy in
Give equations for the reaction of salicylic acid with the following: a) acetyl chloride/pyridine b) methanol/HCl/heat c) sodium bicarbonate, room temperature
A precipitate again formed and was filtered off. Finally, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. Which metal ions were definately present, which were definately absent, and which may or may n..
what is the total volume of gases produced by the combustion of 500g of butane. assume 1 atm, temp 28 degrees C and that water is produced as a gas
Determine the partial pressure of Ar, argon gas in the flask and A flask is filled with 1.20 of argon Ar gas at the temperature of twenty five degree Celsius.
A calorimeter contains 125 g of water at 26.1°C. A block of metal with a mass of 25 g is heated to 96.5°C and then placed in the water in the calorimeter.
A 17.6 g sample of an alloy at 93.0°C is placed into 50.0 g of water at 22.0° C in an insulated coffee-cup calorimeter with a heat capacity of 9.2 J/K. If the final temperature of the is 31.1°C, what is the specific heat capacity of the alloy
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