Internal-standard method
Why is the internal-standard method often used in plasma emission spectrometry?
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Calculate the percentage of empty space in 1 mole of water at 25 c. obbtain the density from the experiment "some measurements of mass and volume." the volume of a molecule of water can be taken as the sum of the volumes of the two hydrogen
Q: Once the solvent front reaches the top of the chromatographic paper, solvent begins to evaporate from the top edge of the paper and the remaining solvent continues to move up the paper.
Carbon monoxide and water vapor, each at 200. Torr, were introduced into a 250. mL container. When the mixture reached equilibrium at 700.°C, the partial pressure of CO2(g) was 88 Torr. Calculate the value of K for the following equilibrium.
The filtrate after the removal of the black precipitate was basified with 6M ammonia. This when treated with 3M ammonium carbonate, it gave a white precipitate. This white precipitate was dissolved in 6M acetic acid and basified with ammonia(6M).
The average pH of precipitation in rural areas is 7.00. Assuming that the pH is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere.
The empirical formula for acetic acid is CH2O. Its molar mass is 60 g/mol. The molecular formula is
A certain first-order reaction () has a rate constant of 7.50×10-3 at 45 . How many minutes does it take for the concentration of the reactant, to drop to 6.25 of the original concentration?
In the reaction between potassium carbonate and calcium nitrate (balanced eq: K2CO3 + Ca(NO3)2--> K2(NO3)2 + CaCO3), why wouldn't ...--->2KNO3 +CaCO3 be right?
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This week, you will continue your exploration of estimator variables that might influence the reliability of eyewitness testimony.
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