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What is an indicator and explain how it is used in titration. Enumerate the criteria in choosing the indicator for a specific titration.
What is the total mass of each of these elements in the Earth's crust (1 t = 1000kg)?
A 4.5 g nugget of gold absorbed 276 j of heat. What was the final temperature of the gold if the initial temperature was 25 OC ? The specific heat of gold is 0.129 j/g OC.
compound has been analyzed and found to contain the following masses of elements: Carbon 0.2990g, hydrogen 0.05489g, nitrogen 0.2318g, and oxyen 0.1328g. calculate the tmpirical formula of the compound.
What volume of O2 is needed to react completely with 20.9L of H2 to give H2O if all gases are measured at 25 degrees C and 1atm? The Balanced equation is: 2H2+O2 ----> 2H2O
The partial pressure and Henry's law constants for SO2 and H2O2 are 2.7 ppm (KH = 1.2 mol L-1atm-1) and 4.9 ppb (KH = 1.0E5 mol L-1atm-1), respectively. Calculate the reaction rate of this process.
At a certain temperature and pressure 4.2 L of N2 reacts with 6.3 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced? (L)
What are all the possible products for the following alkane substitution reactions?
laws of thermodynamics. Why is there no law for the conservation of entropy?
what is the appropiate mechanism for the radical polymerization of 1-butyne? show the polymerization of three units of 1-butyne.
Calculate the temperature in K for a blackbody radiation with ?max = 700 nm. ( the wavelenght corresponding to the maximum in the planck distribution at the temperature T)
M HNO3 is mixed with 439 mL NaOH with pH=13.97. What is the pH of the resulting solution?
The hydrolysis of ethyl acetate (CH3COOC2H5) by sodium hydroxide yields ethanol (C2H5OH) and sodium acetate (NaO2CCH3) by the reaction shown
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