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2.89 The element lead (Pb) consists of four naturally occurring isotopes with atomic masses 203.97302, 205.97444, 206.97587, and 207.97663 amu. The relative abundances of these four iso-topes are 1.4, 24.1, 22.1, and 52.4% respectively. From these data, calculate the atomic weight of lead.
Would it be possible to vary the temperature of a system consisting of water and ethanol (CH3CH2OH) while maintaining an equilibrium between solid, liquid, and vapor phases?
Determine Delta H in units of kj/mol AgCl. Presume that the density as well as heat capacity of the solutions is the same as that of water. State a balanced reaction for the process.
A certain ionic lattice consists of a ccp sublattice of cations. The anions occupy all of the tetrahedral sites. What is the empirical formula of the compound
A gas occupies a volume of 75 ml when the pressure is 380 mmHg. What volume does the gas occupy at 1140 mmHg
What each test reveals about an unknown halide ion? Suggest another test which would confirm that identity. Addition of Cl2 and CH2Cl2 to an aqueous solution of an unknown halide ion led to a dark CH2Cl2 layer.
What is the balanced molecular equation for the reaction between (Pb(NO3)2 and K2CrO4). Complete ionic and net ionic equations
firstly in order to perturb the structure of protein jyou can make any substitution you wish for aa21 the 21st
what is the partial pressure of nitrogen in a container that contains 3.96mol of oxygen , 7.49 mol of nitrogen and 1.19 mol of carbon dioxide when the total pressure is 563 mmHg?
For each of the following processes, indicate whether the signs of S and H are expected to be positive, negative, or about zero.
determine how hot should be the air in a ballon be heated ifnbsp it has initially a volume of 750. l atnbsp the
what is the broglie wavelength of an electron moving at one-tenth the speed of light. mass of the electron = 9.109* 10^-28
the heat capacity of liquid water is 4.18 jg degrees c and the heat of vaporization is 40. kjmol. how many kilojoules
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