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If a nonvolatile, yellow crystalline solid sample of 0.351 g is dissolved in benzene (C6H6) of 15.8 g formed a solution. this solution freezes at the temperature of 4.77 degree celsius. determine the molar mass of this yellow solid. ( freezing point of benzene = 5.51 degree celsius and the freezing point depression constant, kf, = 4.90 oC/m.)
How many gms of H2O must be combined to 519.5 gms of methanol at 20°C to have an osmotic pressure of 408 mm of Hg? Methanol density = 0.8921 g/mL.
What volume of hydrochloric acid solution of 0.25 M must be diluted to prepare 1.00 L of 0.040 M HCl and calculate Keq at this temperature for the given reaction 2 NOCl (g) W 2 NO (g) + Cl 2 (g) ( reaction is at equilibrium):
Find the temperature and the pressure of a gas inside the cylinder - what was the initial pressure of the gas in the cylinder?
Multiple choice questions in organic chemistry - Which of the following statements are true about the processes of melting and freezing?
Identify the unknown gas - Find the molecular formula of the compound
State the conditions under which all derivatives of benzene like chlorobenzene, benzoyl chloride and chlorophenyl methane would react with sodium hydroxide.
A body consists of a right circular cone whose base is 12 in. and whose altitude is 16 in. A hole 8 in. in diameter and 4 in. deep has been drilled from the base. The axis of the hole coincides with the axis of the cone. Locate the centroid of the..
For the given reaction, 2 HCl (aq) + Ba(OH)2 (aq) BaCl2 (aq) + 2 H2O (l) 73.0 grams of HCl are allowed to react with 342 grams of BaCl2.
Questions on chemical equations - Write a balanced equation for this reaction. Include the states of matter for each compound.
A woman requires taking ibuprofen twice daily in 625mg amount. Each pill in the bottle is 250 mg then determine the number of pills the woman requires to consume each time she needs 625mg dosage
Find out the Kb of ammonia if the pH of a buffer formed by mixing 50.0 mL of 1.00 M NH 3 and 50.0 mL of 1.00 M ammonium nitrate?
The air track carts in the figure are sliding to the right at 1.0 meter per second. Find the speed of the carts.
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