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Please help me understand and guide me: Atomic Mass
Isotope Atomic Mass (atomic mass units) Percent Natural Abundance
130Xe 129.96 56.4%
131Xe 130.94 36.9%
132Xe 132.05 6.7%
Based on the atomic masses and the natural abundances shown in the data table, calculate the average atomic mass of calcium
2) the Table below gives information about two isotopes of element X
Isotope Mass Relative Abundance
X-258 258.97 82.41%
X-259 259.06 17.59%
Calculate the average atomic mass of X
3) Naturally occurring isotopes of elemental antimony is a mixture of isotopes. the percent composition of the two most abundant isotopes is listed below:
-54.37% of the antimony atoms have a mass of 121 atomic mass units
-45.63 % of the antimony atoms have a mass of 122 atomic mass units
Calculate the atomic mass of antimony
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A red blood cell with an inner concentration of 0.9 g NaCl per 100 mL of solution is placed into a 2.0 g NaCl per 100 mL solution
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How techniques for sample digestion and extraction can increase efficiency, throughput and accuracy in drug analysis when utilised prior to separations' methods.
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An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g) has partial pressures of 217.0 Torr, 13.2 Torr, and 13.2 Torr, respectively. A quantity of Cl2(g) is injected into the mixture, and the total pressure jumps to 263.0 Torr.
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