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It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration). A 46.06 gram sample of a hydrate of MnSO4 was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, 37.19 grams of the anhydrous compound remained. What is the formula of the hydrate?
The principal quantum number (n): A. specifies the principal shell of the orbital. B. specifies the subshell of the orbital. C. specifies the 3-D shape of the orbital
How much heat is evolved when 1235 g of water condenses to a liquid at 100°C? ΔHcond = -40.7 kJ/mol.
Discuss the importance of economics as it relates to pollution prevention. Supple at least two seperate examples to augment your discussion.
What mass of water would need to evaporate from your skin in order to dissipate 1.7 × 105 J of heat from your body? H2O(l) → H2O(g) ΔHvap = 40.7 kJ/mol
A. Epinephrine, C9H13NO3, has a concentration of 10-10 M in circulating blood. Calculate the diameter of a round swimming pool with a water depth of 2.0 M that would be needed to dissolve 1.0 g (about a teaspoon) of epinephrine.
What volume of 0.200M Hydrochloric acid must combined to 250mL of 0.300M C8H7NaO3 to produce a buffer of solution with a pH of 3.37?
Compute the Ka for the acid if the pH of the resulting solution = 6.36. and determine the pH of the resulting buffer
It takes 55.0 J to raise the temperature of an 11.7 g piece of unknown metal from 13.0 C to 25.0C. What is the specific heat for the metal?
A .692 L NaCl solution is diluted to a volume of 1.25 L and a concentration of 4.00 M. What was the initial concentration?
Consider the titration of a 24.0 ml sample of 0.120 M HC2H3O2 with 0.105 M NaOH. Determine the initial pH.
Compute the enthalpy change for this reaction per mole of this substance and dissolves via the reaction and the temperature of the solution rises to twenty eight degree celsius.
N2H4+3O2----2NO2+2H2O The limiting reagent is O2 how many kg of NO2 are produced from the reaction of 75kg of the limiting reagent.
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