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According to the following chemical reaction, what happens when excess sulfuric acid is added? 2CrO42- (aq, yekllow) + 2H3O (aq) <----> Cr2O72- (aq, orange0 + 3H2O (l)
The original volume is 70. cm3. If the combustion of this mixture releases 855 J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion is converted into work to push back the pisto..
Find t what temperature is it necessary to have twice as many atoms in the ground state as in the excited state at 16.4 1/cm of c atoms The degeneracy of the ground state is 1 and the first state degeneracy is 3
What is the pH of the a buffer solution containing 0.10 moles of acetic acid and 0.13 moles of sodium acetate in 1.0 L after adding 0.02 moles of KOH?
Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction: ?H3PO4 + ?Mg(OH)2->?Mg3(PO4)2 + ?H2O
What is the molarity of a solution made by dissolving .34 moles of NaCl in 455 mL of water?
Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid dissociates in water:
How much heat is liberated at constant pressure if 0.834 g of calcium carbonate reacts with 48.9 mL of 0.668 M hydrochloric acid? CaCO3(s) + 2HCl(aq) > CaCl2(aq) + H2O(l) + CO2(g); DeltaH = -15.2 kJ
A current of 11.3 A is applied to 1.25L of a solution of .552M HBr converting some of the H+ to H2(g).
This energy is called the work function of that metal. What is the longest wavelength of radiation (in nm) that could cause the photoelectric effect in each of the following metals
A room contains 12,000 ft.³ of air at 75°F and 29.7 inches Hg Absolute. The air has a dew point of 60°F. How many pounds of water vapor are in the air
The bp of the solution was 104.3C when 40 g was dissolved in 150mL of water. I lose points if I am more than 5% off. Any ideas what the actual substance might have been? Keep in mind this is a college gen chem lab.
How many Joules are required to heat 2 L of water in a pot from 20 degree C to the boiling point of water? The specific heat of water is 4.18 J/g. Degree C and the density of water is 1 g/mL
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