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Sodium carbonate (Na2CO3) can be produced by heating sodium bicarbonate (NaHCO3). A student heats 5.128 g sodium bicarbonate to completely decompose the sample to sodium carbonate. 3.2349 g of sodium carbonate was produced. Calculate the atom economy of this reaction.
2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)
What volume of H2 gas (in L ), measured at 742 mmHg and 84C, is required to synthesize 25.8g of CH3OH?
The shielding of electrons gives rise to an effective nuclear charge,Zeff, which explains why boron is larger than oxygen. Estimate the approximate Zeff felt by a valence electron of boron and oxygen, respectively
Ultraviolet light with a wavelength of 200nm is incident upon gold surface in a vacuum chamber. What is teh wavelength of the most energetic electrons that are ejected from the surface?
An isolated tube contains 1 mole of argon at 5atm on one side of a movable barrier held in place by a pin. On the other side of the barrier is 0.2 mole of neon at 0.5atm, the the whole system is at 298K.
Calculate the amount of energy in the form of heat that is produced when a volume of 2.73 L of SO2(g) is converted to 2.73 L of SO3(g) according to this process at a constant pressure and temperature of 1.00 atm and 25.0 °C. Assume ideal gas behav..
A laser pulse with wavelength 555 contains 4.40 of energy. How many photons are in the laser pulse?
What are the values of Ka and pKa for lactic acid? b. Calculate the pH of a .10M HCN solution, which has a Ka = 1.4x10^-9 at 25C. Assume that the dissociation of HCN is negligible compared to its initial concentration.
While making a methyl butanoate ester, and after we were done heating it up, we filtered it with water and NaHCO3. What gas escaped during the sodium bicarbonate washing?
When a 3.00-g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of 2.472 kJ·K-1, the temperature decreases by 0.280 K. Calculate the molar heat of solution of KCl in kJ/mol
A system absorbs 198kJ of heat and the surroundings do 120kJ of work on the system. What is the change in internal energy of the system
Write a balanced, net ionic equation for the precipitation reaction of cacl2 and cs3po4 in an aquaeous solution.
If 5.50 of the unknown compound contained 0.183 of and 0.367 of , how many moles of oxygen, , were in the sample.
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