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Magnesium burns in air to produce a bright light and is often used in fire works displays. The combustion of magnesium follows the thermo chemical equation 2 Mg(s) + O2(g) ® 2MgO(s) ΔHo = -1203kJ How much heat (in kJ) is liberated by the combustion of 6.54 g of magnesium?
predict the vernier angle based on the following best-fit line equation: y = 0.0126x + 25.68? y is for vernier angle and x is for wavelength in nm. Estimate to the nearest whole number.
Concentrated HCl is a 12.0 M solution of HCl in water. How many milliliters of concentrated HCl must be diluted to 250 mL so that the resulting solution is 0.0500 M in HCl
How many grams of ether solute and THF solvent is required to make 2432 g of a 5 m solution? This is on my notes but for some reason I do not understand how the professor get the answer 2436 to this problem
determine what given process is occurring when the color appears in the flame? choose your answer correctly out of the
a if 65.65 g of mercuryii nitrate and 4.26 g of hydrogen sulfide are mixed in 490.0 g of water to form 54.16g of
The standard enthalpy of formation of carbon monoxide is more esothermic than the sum of the standard enthalpies of formation of methane and water.
The acid ionization constant of Fe(H2O)62+(aq) is 3E-6. Compute the pH of a 0.2 M aqueous solution of Fe(NO3)2. 5. Compute the solubility of Mg(OH)2 in a buffer solution at pH=10.31. The solubility product of magnesium hydroxide is 1.2E-11
A 15.0 g piece of iron (Cp = 25.09 J/mol-C) is heated to a temperature of 47.0 ?C and then placed in contact with a 275 g piece of copper at 20.0 ?C (Cp = 25.46 J/mol-C). What was the final temperature of the two pieces of metal?
How would a student make 500.0 mL of a 0.07000 M solution of iron (III) using a stock solution that is 0.2550 M in iron (III)? Explain how this would be done.
A graduate student tried to make -fluorophenylmagnesium bromide by adding magnesium to an ether solution of -fluorobromobenzene.
The active ingredient in some antiperspirants is aluminum chlorohydrate, Al2(OH)5Cl. Analysis of a 2.000-g sample of antiperspirant yields 0.334 g of aluminum. What percent (by mass) of aluminum chlorohydrate is present in the antiperspirant?
a 112.2510g irregularly shaped object is placed in a graduated cylinder that contains 25.0 cm cubed of water. What is the solids density if the new water level was 37.5 cm cubed
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