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A certain quantum mechanical system (NOT the hydrogen atom) has the energy levels shown in the diagram below. The energy levels are indexed by a single quantum number n that is an integer.
Hydrochloric acid (HCl) reacts with sodium carbonate (Na_2CO_3), forming sodium chloride (NaCl), water (H_2O), and carbon dioxide (CO_2). This equation is balanced as written
calculate the concentration of an NaOH solution if 25.0ml of the solution is needed to neutralize 17.5ml of a 0.419M HCL solution
What is the theoretical yield of calcium carbonate if 2.05 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below?
How many total moles are produced when 0.595 mol of methanol (CH3OH) are combusted in oxygen to produce carbon dioxide and water
What is the final pH when 100 ml of 0.1 M HCl is added to 150 ml of 0.2 M dihydrogen phosphate
Measurements of strontium in enamel from extracted wisdom teeth were done by atomic absorption spectroscopy. Solutions were prepared with a constant total volume
Elements in the first short period are limited by the octect rule whereas those in the higher period can expand their valence shells. Describe what this means, account for this phenomenon and give an example of each.
The hydrogen gas formed in a chemical reaction is collected over water at 30 at a total pressure of 737. What is the partial pressure of the hydrogen gas collected in this way
The precipitate formed was washed and dried .Its mass was 0.287g.Find the mass of NaCl in the initial sample.
A solution is 0.0100 M in Pb2+ ions. If 0.103 mol of solid NaI is added to 1.00L of this solution (with negligible volume change), what percent of the Pb2+ ions remain in solution?
what is the maximum amount of sodium chloride that can be separated at 25 ºC by filtration, and what is the mass percentage of sodium chloride in the filtrate?
A toothpaste contains 0.24% by mass of sodium fluoride used to prevent caries (cavities) and 0.30% by mass of triclosan (C12H7Cl3O2). A PRESERVATIVE + ANTIGINVITIS AGENT.
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