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A sample of ammonia, NH3, contains 3.3 x 1021 hydrogen atoms. How many moles of nitrogen atoms are in this sample?
What volume of O2 at 684 mmHg and 21 degree celsius is required to synthesize 25.0 mole of NO?
what is the percent yield of water produced when 138 g ethyl alcohol c2h5oh is combusted in excess oxygen if the actual
CaC2(s) + 2H2O(l) = C2H2(g) + Ca(OH)2(aq) . If 34 g of CaC2 are consumed in this reaction, how much H2O is needed?
Determine which of them exhibit resonance. (In other words, which of the following molecules exhibit resonance? Note: there is more than one answer and you must choose all of the molecules in the list that exhibit resonance.)
A 2059-kg elevator moves with an upward acceleration of 2.0 m/s2. What is the tension in the cable that supports the elevator
Calculate the volume the gas will occupy if the pressure is increased to 1.87 while the temperature is held constant.
If 1.00 of argon is placed in a 0.500- container at 30.0 , what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation). For argon, and.
Calculate the molar enthalpy change ?H~rxn for the dissolution of KNO3 in water. Calculate in the error in ?H~
Are the physical and chemical properties of a compound necessarily similar to those of the elements of which it is composed
An unknown compound with a molecular formula of C8H18 reacts with chlorine in the presence of light and heat. From the reaction, only one compound with the formula C8H17Cl can be isolated. What is the structure of the original unknown compound?
Calculate the pH of the resulting solution at each of the specified points in the titration. Initially: pH of HCl
Determine the acid content of the vinegar as wt % CH3COOH, acetic acid
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