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Consider the hypothetical elements X, Y, and Z with the following Lewis formulas. X with seven electron dots around it, Y with six electron dots, and Z with five electron dots. To which groups in the periodic table would each element belong?
Acteylene gas (C2H2) can be produced by the reaction of calcium carbide and water CaC2 (s) + 2H2O----> C2H2 (g) + Ca(OH)2 (aq) How many liters of C2H2 at 742 mmHg and 26 degrees C can be produced from 2.54 g CaC2 (s)
Calculate the pH of a solution made by dissolving 2.89 g of sodium fluoride and 17.1 mL of 0.309 M hydrofluoric acid in enough water to make 177 mL of solution.
Using calorimetry experiment, how many grams of CaCl are required to cause a burn at 60 degrees celsius in 1000mL of water?
Calculate the wavelength (nm) of the photon absorbed when the electron goes from a n= 2.00 energy level to a n= 5 energy level.
During the discharge of an alkaline battery, 13.9 g of Zn are consumed at the anode of the battery. What mass of MnO2 is reduced at the cathode during this discharge
Calculate the mass of air in an air-filled tire. Part B: Calculate the mass of helium in a helium-filled tire. Part C: What is the mass difference between the two?
What is the name of the product that results when 4-methylcyclohexane is treated with 2% ethnolic PBP solution
The visible part of the hydrogen atom spectrum is called the Balmer series (n1 = 2). The violet line has a wavelength of 410.2 nm.
Using the calibration equation and the absorbance you measured for the prepared sample, calculate the ferroin concentration. Show your work and don't forget to include units.
you place ethanol of 100 grams and water of 100 grams in a refrigerator. both are at room temperature initially.
On a mission to a newly discovered planet, an astronaut finds chlorine abundances of 13.85% for 35Cl and 86.15% for 37Cl . What is the atomic mass of chlorine for this location. The mass of 35Cl is 34.97 amu. The mass of 37Cl is 36.97 amu.
If 10.0mL of blood plasma has a mass of 10.279g and contains 0.870g of protein, what is the mass/mass percent concentration of the sample?
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