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Melinda wants to lose 15 pounds by summer, which is 20 weeks away. She currently weighs 150 pounds and is maintaining her weight with an energy intake of 14 kcals per pound body weight. Based on dietary changes only, calculate her daily energy requirements if she wants to lose weight at a steady level of the 20-week period.
In a qualitative analysis procedure, a chemist adds HCl to an unknown group of ions and then saturates the solution with H2S so that the solution is 0.1 M in HCl and 0.10 M in H2S. (a) What is the [HS -] of the solution
Calculate the molar concentration of CO2 for a sample that has a pH of 6.220 and a HCO -3 concentration of 0.0020 M. For carbonic acid pKa1=6.33 and pKa2=10.35.
Find delta heat formation of butane. C4H10 + 13/2 O2 ---> 4 CO2 + 5 H2O. Delta H comb= -2881.9 Delta Heat formation of CO2 = -393.5kJ/mol Delta Heat formation of H2O = -241.8kJ/mol What is the kJ
Descibe at least four possible factors which may influence the amount of light absorbed by a solution and how these factors may affect the absorption
Describe the roles played by Max Planck, Niels Bohr, Erwin Schrodinger, Paul Dirac, Albert Einstein and Werner Heisenberg in the development of atomic or quantum theory.
gaseous CO2 can react with H2O and affect the pH of the solution. Write the balanced chemical reaction that occurs. Use this reaction to describe why solutions of distilled water will test slightly acidic.
Question- Calculate the lattice energy (kJ/mol) of the hypothetical ionic compound MX from the information given below.
Task 1 concerns exploring the thermochromic behavior of cobalt chloride ethanol solutions (CoCl2(EtOH)3) with methanol (MeOH).
Explain how many grams of copper (II) sulfate pentahydrate would use to make 400.0 mL of 0.750 M solution
Chlorine can be generated by heating together magnesium hypochlorite and hydrochloric acid. Magnesium chloride and water are also formed.
Sodium stearate (C17H35COONa) is a major component of bar soap. The Ka of the stearic acid is 1.3 multiplied by 10-5. What is the pH of 16.5 mL of a solution containing 0.45 g of sodium stearate
since 1 mole of NaOH reacted for each 1 mole of acetic acid in solution, what is the number of moles of acetic acid present in a 10.0 mL sample of vinegar
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