How many grams of ethyl alcohol added to water
How many grams of ethyl alcohol, C2H5OH, must be added to 1.000 kf of water so that the solution will not freeze until -20 degrees C? For water, Kf= 1.86 degrees C/m.
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A .900g sample of water is injected into a 10.0 liter flask at 55 degrees C. How much H2O (l) remains if any, remains in the flask once equilibrium is reached? The vapor pressure of water at 55 C is 118 mmhg.
Ammonia rapidly reacts with HCl producing ammonium chloride. Calculate the number of grams of excess reactant when 7.5g NH3 reacts with 4.3g of HCl.
What is the empirical formula? If the molar mass of the chlorine oxide is 356.7 g/mol, what is the molecular formula of the compound?
Could this from if sulfuric acid was added to 2,5-dimethyl-2,5-hexanediol instead of hydrochloric acid. why
The maximum kinetic energy observed for these electrons is 1.488 x 10?19 J/electron. What is the wavelength of a laser which will turn the photocell on and cause electrons to be ejected which have absolutely no excess energy
Diamond and graphite are two crystalline forms of carbon. In which form are the bonds between the C atoms arranged at tetrahedral angles to each other? 1. diamond 2. Neither of these 3. graphite
Discuss two ways in which sodium thiosulphate synthesis can be used in reactions. chemical equations are necessary.
A salt dissolves in water to form a green solution. A precipitation is formed when the aqueous solution is treated with buffer NH4C/NH3 and thioacetamine.
Carbon dioxide has an enthalpy of sublimation of 25.2 kJ/mol at -78 OC. If 0.975 kg of dry ice is placed into a bowl open to the atmosphere (i.e., constant pressure), what is the entropy of sublimation at this temperature
A sample of oxygen has a volume of 4.50 liters at 300 K and 800.0 mmHg, how many oxygen molecules does the sample contain?
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