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Which of the following substances are largely ionic, and which are covalent? (a) HF (b) HI (C) PbCl2 (d) BBr3 (e) NaOH (f) CH3Li
A solution of iodine in carbon tetrachloride is 0.10M. How much solvent (carbon tetrachloride) must be added to 50 mL of this solution
2.9 mol Fe(OH)3 and 7.7 mol H2SO4 react according to the equation 2 Fe(OH)3 + 3H2SO4 ->Fe2(SO4)3 + 6H2O. If the limiting reactant is Fe(OH)3, calculate the amount of Fe2(SO4)3 formed.
Elements cannot be decomposed by chemical means, but can be decomposed by physical means.
The student next added 3M KOH solution to the aqueous solution and Mg(OH)2 precipitated. After filtering the solution and drying the precipitate, the student recovered 1.10g of Mg(OH)2. Calculate the percent Mg(OH)2 in the mixture
Determine the rate constant for the reaction at the temperature of 75 degree celsius?
A gas is placed in a storage tank at pressure of 30.0 atm at 20.3 degrees Celsius. As a safety device, there is a small metal plug in the tank made of metal alloy that melts at 125 degrees Celsius.
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.041 M in NH4Cl
a chemical reaction produces 653,550 kJ of energy as heat in 142.3 mins. Calculate the rate of energy transfer in kilojoules per minute.
Determine What is the ? Ssys for the process?(if it is given the specific heat capacity for ethanol is 2.42 J/g K.) express your answer in units of J/K
the values of Hfo given in kJ/mol, calculate the value of ?Go in kJ for the combustion of 1 mole of propane to form carbon dioxide and gaseous water at 298 K.
A slightly bruised apple will rot extensively in about four days at room temperature (25oC). If it is kept in a refrigerator at 4oC, the same extent of rotting takes about fifteen days. How long would it take for a slightly bruised apple to rot on..
There are two naturally occurring isotopes of bromine. 79Br has a mass of 78.9183 amu. 81Br has a mass of 80.9163 amu.
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