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General Chemistry
A system that does work but which transfers no heat to or from the surroundings has
- w > 0, ΔE < 0
- w < 0, ΔE > 0
- w < 0, ΔE < 0
- w > 0, ΔE > 0
General Chemistry
A quality analyst mixes 3ml of 0.255M of Bacl2 with excess Agno3 causing Agcl to precipitate and subsequently isolate 2.01g of Agcl.calculate the yield of the reaction
General Chemistry
A photon of 498nm Was emitted from a silicon atom. Calculate the energy of all the atomic levels of silicon and show the atomic levels are quantified
General Chemistry
A quality control analyst mixes 30.0ml of 0.255M BaCl2 with excess AgNo3 causing AgCl to precipitate and subsequently isolated 2.01g of AgCl. Show the balanced equation for the reaction and calculate the percent yield of the reaction
General Chemistry
How to show that the atomic levels are quantized
General Chemistry
Hi guys, so I have the MW of the compound and it is 345 g/mol the compound is 0,2 M so it is 0,2 mol/liter and I need to calculate the mass?
General Chemistry
20. What is the osmotic pressure (in atm) of a solution formed by dissolving
25.0 mg of aspirin (C9H8O4) in 250 cm3 of water at 25
25.0 mg of aspirin (C9H8O4) in 250 cm3 of water at 25
General Chemistry
The freezing point of ethanol is −114.6 The molal freezing point depression
constant for ethanol is 2.00
constant for ethanol is 2.00
General Chemistry
18. The value of the boiling-point-elevation constant (Kb) depends on the identity of:
A. solute and solvent.
B. ions formed upon solution of an electrolyte.
C. solvent.
D. vapour pressure of the solvent.
E. solute
A. solute and solvent.
B. ions formed upon solution of an electrolyte.
C. solvent.
D. vapour pressure of the solvent.
E. solute
General Chemistry
17. A 0.100 m solution of which one of the following solutes will have the lowest
vapour pressure?
A. KClO4
B. Ca(ClO4)2
C. Na3PO4
D. C6H12O6
E. NaCl
vapour pressure?
A. KClO4
B. Ca(ClO4)2
C. Na3PO4
D. C6H12O6
E. NaCl
