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Compute the theoretical amount of CaCl2 that would be needed to change the temperature of 50ml of water from room temperature 20degreesC to 45degreesC.
Rank the bonds of CaBr2, CH4, and Na3N, in order of decreasing ionic character. Where do we always find compounds containing metals, in this ranking order?
What concentration should you make your stock solution of vincristine in order to make this 5uL addition?
The activation energy of a certain reaction is 76.4 kJ/mol. How many times faster will the reaction occur at 42C than at 0C
A student carries out a reaction of Mg with HCl at 20'C and collects 21 cm3 H2 gas measured at a pressure of 751 torr. How many moles does it represent
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
Write an equilibrium expression for each chemical equation. 1. 2CO(g)+O2(g)===2CO2(g) 2. N2(g)+O2(g)===2NO(g) 3. SbCl5(g)===SbCl3(g)+Cl2(g) 4. CO(g)+Cl2(g)===COCl2(g)
A sample of gas is heated. During the heating process, the volume of the gas increases 1.7 times. If the initial temperature of the gas is 80degrees C. what is the final temperature of the gas?
What is the molar mass of a compound if 5.96g of the compound dissolved in 25g of chloroform solvent has a boiling point change of 4.80 c. The boiling point constant for chloroform is 3.63 c/m.
A nucleus of mass number 27 contains 14 neutrons. An atomic ion of this element has 10 electrons in it. Write the symbol for this atomic ion
f the water if brought to the vapour state at 204C and 710 KPa, where its enthalpy is 2649.4 KJ/Kg and its specific volume is 291.8 cm^3/g, what is the internal energy (U) at these conditions in KJ/Kg? c) Calculate the change in internal energy (d..
what is the molar mass of an unknown molecular compound is 3.42grams dissolved in 41.8 grams benzene begins to freeze
a 10.00g sample of toothpaste contaning stannous fluoride gives0.145g precipitate of stannous phosphate.what is the percentage of snf2 in the toothpast sample.
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