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In a titration, 25.0 mL of 0.154 M HCl was added to 45.0 mL of 0.213 M ammonia (NH3). What is the pH at this point? (Kb of NH3 = 1.8 × 10-5 )
The atomic weight of a newly discovered element is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu.
The temperature of Beaker X = 75°C and the temperature of Beaker Y = 50°C after Five minutes . determine the temperatures be after another 5 minutes have passed?
Calculate the corresponding entropy for each state. d) Calculate the temperature for each state.
How much ethylene glycol (C2H6O2) the major component of antifreeze, must be added to 1 L of water to keep it from at -15 F? Kf= 1.86 C/m.
Draw all stereoisomers having molecular formula C6H12 that contain one double bond and give the IUPAC name for each compound
The addition of 6 g of salt to a sample of pure water causes its freezing point to be reduced from 0°C to -1.5°C. After an additional amount of salt is dissolved in the solution
Analysis with an elaborate instrument indicates that substance A contains two elements. Substance B and substance C react to give a new substance D. Substance E decomposes upon heating to give substance F and substance G. Heating substance H to 10..
How many milliliters of boiling water are required to dissolve 25g of phthalic acid? If the solution were cooled to 14oC, how many grams of phthalic acid would you recrystallize out?
Five hundred liters of a gas are cooled from 20°C to 10°C while the pressure remains constant.what the new volume will be?
Determine the theoretical and percent yields of ethanol if 684g sucrose undergoes fermentation and 349g ethanol is obtained?
A 97 gram solution of silver nitrate contains 10 grams of AgNO3. What is the percent by mass of silver nitrate in this solution
If a sample of Al2(SO4)3 is found to contain 863 mol of Al3+ ions how many moles of Al2(SO4)3 formula units are present?
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