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Lithium carbonate, Li2CO3, contains 18.8 % lithium and is used in the treatment of mental illnesses such as bipolar disorder. What mass of lithium is present in a 1.87-g dose of lithium carbonate?
Determine the specific heat of a material if a 38 g sample of the material absorbs 40. J as it is heated from 298 K to 313 K?
a 43 l tank contains a gas under a pressure of 369 atm. what volume would the gas occupy at the same temperature at 710
The balloon is designed to continue its ascent to an altitude of 30 km, where it bursts, releasing a package of meteorological instruments that parachute back to Earth.
a saturated solution of barium chloride at 30c contains 150 g water. how much additional barium chloride can be
Question- Salt water can effectively loosen up the cellular content because it weakens many inter-molecular interactions. Which of the following inter-molecular forces, however, cannot be weakened by salt water
a 3.20 l sample of neon at 4.57 atm is added to a 11.0 l cylinderthat contains argon. if the pressure in the cylinder
Using the electronegativity chart, please write out the electronegativity scale to calculate the type of bond in the following pairs. Write the scale/labels:
Draw the structure of each product obtained when the given compound is treated with the reagent specified below: a. CH3C(=O)CH2CH2C(=O)OCH3 (1,4-dioxacyclohexane compund) + HBR (reagent)
What is the pH at the stoichiometric point (end point) for the titration of 50 ml of 0.20 M methyl amine CH3NH2 (aq) with 0.20 M perchloric acid HClO4(aq)? For methyl amine (CH3NH2), Kb = 3.6 x 10^-4.
How many moles of NaOH per liter of water are needed for this pH adjustment. (pK1=6.3 and pK2=10.3). How many moles of lime (Ca(OH)2) would be required
Problem- The freezing point of a 0.01 m aqueous solution of a nonvolatile electrolyte is -0.072 deg. Celsius. What would you expect the boiling point of this same solution to be. (Kf = 1.86 degrees C, Kb = 0.512 C/m)
The freezing point of pure benzene is 5.50 degrees Celsius and its pooling point is 80.1 degrees Celsius. Explain what can you conclude about the state of benzoic acid molecules at the two different temperatures
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