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Magnesium metal rects with oxygen to make a white powder knon as magnesium oxide. As the reaction proceeds, a bright white flame is seen. It is found that 2.6 g of magnesium reacts with1.6 of oxygen.
a) What is the word eequation
b) Determine the mass of magnesium oxide that forms
c) Find the percent of madnesium by mass in magnesium oxide.
d) Find the percent of oxygen by mass in magnesium oxide
e) Use the datea from thi exeriemnt to verify the molecular formula of magnesium oxide.
A sample of H½O with a mass of 46.0 grams has a temperature of -58.0 C. How many joules of energy are necessary to melt 46.0 grams of ice? (Use 2.1 J/g.C for the specific heat of ice, and 334.4 J/g for the heat of fusion of water.)
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule)
If equal amounts of I2 and cyclopentene are mixed at 1 bar and 500k, what will be the equilibrium partial pressure of I2. Kp=7.76x 10^-3
1. when performing a friedel-crafts alkylation reaction not only does one have the problemsnbspof multiple alkylation
How much heat (in kJ}) is evolved in converting 1.00 {mol} of steam at 160.0C to ice at -55.0C? The heat capacity of steam is 2.01 {J}}/{{g.C}} and of ice is 2.09 {J}}/{{g.C}}.
The activation energy for the reaction is 48.1kj/mol. What is the half-life (in hr) in the winter (10.0 C)?
A stellar object is emitting radiation at 3.75 mm. If the detector is capturing 3.3*10^8 protons per second at this wavelength, what is the total energy of the photons detected in one hour
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case. A - 2.8*10^-3 M Fe(NO3)2 B - 1.6*10^-3 M MgBr2
What is the volume of an object that has a mass of 3.4 g and a density of 2.4 g/mL? choose one below: 1.4 mL 0.71 mL 1400 mL 710 L 14 mL
If we are using the 0.1% methyl red indicator, what is the approximate pH of the equivalence point of the titration between borax and sulfuric acid
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
A second assay was performed by making a derivative, ammonium phospho-molybdate, which has visible absorption peak at ~ 400nm. From the Beer's Law plot, estimate the concentration of the unknown solution:
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