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The freezing point of a solution of 0.10 g of an unknown compound in 5.640 g of camphor (Kf = 37.7 degrees C/m) is 2.1 degrees C lower than the freezing point of pure camphor. Calculate the molar mass of the unknown compound assuming it is a non-electrolyte?
at 75 degrees celsius, a gas has a volume of 3.22 dm^2. What volume will it occupy at 75 k?
If 20.45 ml of the above standardized base is required to neutralize 20.4 mg of an unknown organic acid, what is the molar mass of the carboxylic acid
When 79.272 cg of nitrogen gas is reacted with 79.272 cg of hydrogen gas, how many grams of ammonia are formed?
the forensic technician at a crime scene has just prepared a luminol stock solution by adding 11.0 of luminol to creating a solution with a total volume of 75.0 . What is the molarity of the stock solution of luminol?
What will the total pressure become?
Unlkie amines, amides are not ver strong bases. In fact, the nitrogens in amides are not even the most basic position - protonation occurs at the carbonyl oxygen. Provide three reasons why the oxygen in an amide is more basic than the nitrogen.
How many milliliters of 0.280M Na2S2O3 solution are needed to titrate 2.396 g of I2 according to the equation below?I2+2SO3 2- ----> S4O6 2- + 2I-
Why is comparing moles of reactants without using the balanced equation not the proper way to determine the limiting reactant? Is it because you need to have it balanced to understand the moles being used correctly
We mixed ortho vanillin with carbethoxymethylene triphenyphosphorane. I would like to know how the imide was created in the first step. What protonated the amine before the amine protonates the carbonyl
A sample of oxygen is collected by water displacement at a temperature of 35C when the barometric pressure is 752 mm Hg. What is the partial pressure of the dry gas?
Suppose you have a mixture of 2 substances. You know one of the substances is either 2-chlorobenzoic acid or diphenyl acetic acid. The second substance is either p-dibromobenzene or acenaphthylene.
When the one ore lead (ii) sulfide burns in ixygen, the products are lead (ii) oxide and sulfur dioxide A. How many grams of oxygen are required to react with 0.126 mole lead (ii) sulfide?
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