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The recommended daily dietary intake of calcium for adult men and pre-menopausal women is 1100 mg/day Calcium citrate , Ca3(C6H5O7)2. What mass of calcium citrate would be needed to provide the recommended daily intake of calcium?
A gas occupies a volume of 2.45 L at a pressure of 1.03 atm. What volume will the gas occupy as the pressure changes to 0.980 atm.
Determine the original mass of liquid, G, that was placed in the container. (ignore the volume occupied by the liquid in these calculations.)
The temperature dependence of the reaction rate constant is given by the equation: ... ln k = ln A - Ea/RT ... ... Where: k = rate constant T = temperature A
Calculate the concentration (M) of sodium ions in a solution made by diluting 70.0 mL of a 0.274 M solution of sodium sulfide to a total volume of 400 mL.
Draw condensed structural formulas for the straight-chain alkanes with seven and eight carbons
Assume that you need to prepare 4-methyl-2-pentyne and discover that the only alkynes on hand are acetylene and propyne. You also have available methyl iodide, isopropyl bromide,
An electrochemical cell is constructed with a zinc metal anode in contact with a 0.0520M solution of zinc(II) nitrate and a silver cathode in contact with a 0.00420M solution of silver(I) nitrate
Predict whether each of the following oxides is acidic, basic, amphoteric, or neutral: CO2, NO2, Al2O3, CaO.
An aqueous solution contains 12.7% NaCl by mass. What mass of water (in grams)is contained in 2.5L of the vapor above this solution at 55 celcius? the vaor pressure of pure water at 55 celcius is 118 torr.
a) H2 (g) + Br2 (g) â?" 2 HBr (g) + heat [0.513] [0.62] [0.346] b) N2O4 (g) + heat â?" 2 NO2 (g) [0.0325] [0.022] c) NH4SH (g) â?" NH3 (g) + H2S (g) + heat [0.027] [0.0234] [0.209] Calculate Ke for the following (equilibrium concentrations give..
An individual's blood alcohol content (% alcohol in blood as measured mass per volume = mass of alcohol per volume of blood) was 0.15. If we assume the individual drank all of the alcohol at once
If you take a 10.5mL portion of the stock solution and dilute it to a total volume of 0.350 L, what will be the concentration of the final solution.
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