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Explain when 1.33 g of vitamin K is dissolved in 25.0 g of camphor the freezing point of the solution is lowered by 4.47C.Compute the molar mass of vitamin K.
A solution was prepared by mixing 43.00 mL of 0.190 M HNO3 and 108.00 mL of 0.150 M HNO3. Calculate the molarity of the final solution of nitric acid.
what is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL?
In general terms, why do functional groups impart more chemical reactivity to families that have them. Why don't the alkanes display as many reactions as, say, the amines. Select all that apply
An ideal gas is allowed to expand at constant temperature from a volume of 1.00 L to 5.00 L against a constant external pressure of 2.00 atm. What is the value of w, the work done on the gas
A buffer is prepared by adding 11.0 g of ammonium chloride to 250 ml of 1.00 M solution...What is the pH of this buffer
If the volume of the flask is 135 ml the temperature of the bath is 100C also atmospheric pressure is 760torr. If the average molar mass of air is 29.0 g/mol.
if a chemical reaction a b --gt c d is endothermic what is the sign of deltah for the reaction? would the temperature
The value of ΔE for a certain change is 1325 J. During the change, the system releases 873 J of heat.How much work, expressed in joules, was involved?
Window glass is typically made by mixing soda ash (Na2CO3), limestone (CaCO3), and silica sand (SiO2) and then heating to 1500 degrees Celcius to drive off Co2 from the Na2CO3 and CaCO3
At what temperature is the change in entropy for the reaction equal to the change in entropy for the surroundings?
orbits around a definite point in space made of neutrinos and electrons D) is not a definite point in space, but rather it is a cloud of smaller particles called quarks that deflect alpha particles
to what celsius temperature must 63.0 ml of methane gas at 86.0degc be changed so the volume will be 50.0 ml? assume
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