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A bottle of Montclaire spring water contains 35 ppm of calcium ion (Ca2+). Nutritional guidelines suggest that the human body requires at least 1.0 g of Ca2+ per day to be healthy. How many litres of this spring water would you have to drink per day in order to get all the calcium you need?
when 50 mL of water containing .5 mol HCL at 22.5 degrees C is mixed with 50.0 mL of water at 25 degrees C in a calorimiter, the temperature of the solution increases to 26 degrees C. How much heat was released by this reaction?
Explain how substances that are electrolytes and substances that are non-electrolytes when dissolved in water. Be sure to include
If 405 mL of a gas at 66 degrees Celsius and 595 mm Hg weighs 1.495g, what is the molecular weight of the gas?
Compound A, C8H10, can give 2 isomeric products upon substitution of an aromatic H by -NO2. The 1H NMR spectrum of A shows 2 two-proton doublets at 7.14 and 7.34 ?
Detailed analysis of the 369 and 295 cm-1 bands show them to arise from totally symmetric modes. Show that the Raman spectrum is consistent with a trigonal-bipyrimidal geometry.
Compound X has a molar mass of135.13 · gmol-1 and the following composition: carbon 44.44% hydrogen 3.73%
Question- A solution is made by mixing 500.0 mL of 4.0 M NH3 and 500.0 mL of 0.40 M AgNO3. Ag+ reacts with NH3 to form AgNH3+ and Ag(NH3)2+ according to the equilibrium reactions:
Vanillin is an organic compound containing C,H and O. Combustion of 1.05g of vanillin produces 2.43g CO2 and 0.50 of H2O. The Molar mass of vanillin is 152.16g/mol. What is the molecular formula for vanillin
The mass of the pan is 1.20 kg and the molar heat capacity of iron is 25.19 J/(mol·°C). What is the temperature change of the skillet?
Describe the incident and identify the polymeric or explosive materials and discuss the chemical interactions of the material(s) involved in this incident or hazardous properties relevant to the incident.
Explain the pressure-temperature coexistence line for solid-vapor equilibrium sublimation is for all time less steep in a P versus T plot for a pure material than is the melting line. Define why.
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
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