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Calculate the theoretical mass of Ca^2+ ion in one tablet in grams if there is 750 mg CaCO3 and 320mg Calcium per tablet. The tablet weight 1.801 grams.
What is the minimum (least negative) cathode potential (versus SHE) needed to electroplate silver onto cutlery in a solution of Ag^+ and NH3 in which most of the silver ions are present as the complex Ag(NH3)2^+ and the concentration of Ag^+(aq) i..
Calculate the amount of heat (in J) required to melt the sample. Use the following data: Tp = 44oC; C = 94 JoC-1 mol-1; ?Hfusion = 2.5 kJ/mol.
Which of the following solids is a covalent network? 1. H2O(s) 2. CaCO3(s) 3. Ni(s) 4. SiO2(s)
Choose the answer which lists the atoms Pb, Sb, Ge, and Al in order of increasing atomic radius (smallest atom listed first).
It takes 245 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect?
What volume of CO2 (g) at STP is formed when 6.00 g of cyclopentadiene, C5H6 (g) is fully oxidized
Calculate the molarity and the molality of an NH3 solution made up of 36.5 g of NH3 in 70.0 g of water. The density of the solution is 0.982 g/mL.
product and propose a mechanism when 1-pentene reacts with bromine and water followed by the addition of sodium hydride.
A 1.00 L sample of gas, initially at 273 degrees C and 2.00 atm was cooled to 0 degrees C and the pressure changed to 0.20 atm. What is the final volume of the gas in liters?
organic reactions can be classified as substitutions eliminations or additions and the reagents can be classified as
Determining System Equilibrium, A one-litre cylinder at 458'C is found to contain 0.36 moles of HI (g), 0.15 moles of I 2(g), and 0.18 moles of H2(g). Is this system at equilibrium?
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 272.00 pm.
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