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Silver has an atomic radius of 0.144 nm, an atomic weight of 107.87 g/mol and a density of 10.49 g/cm3 (cm cubed). Determine whether it has a BCC or an FCC crystal structure.
How much heat is needed to warm 250 g of water from 22 C to 98 C? The specific heat of water is 4.18 J/g . Be sure to include units but do not use scientific notation.
A biological sample was submitted to you lab for a nickel assay. Assume you are assaying a 2.06 g tissue sample for the presence or absence of nickel at the 0.1ppb (m/m) level
H2S and H2O have similar structures and thier central atoms belong to the same group. Yet H2S is a gas at room temperature and H2O is a liquid. Use bonding principles to explai why this is. What is the difference between H2O and H2S
a swimming pool 20.0m 12.5 is filled with water to a depth of 3.81m. if the initial temperature of water is 17.5c how
Analysis of a sample of a gaseous compound shows that it contains 85.6% C and 14.4% H by mass. At standard conditions (STP), 120.4 mL of the compound weighs 0.151 g. What is the molecular formula of the compound
A solution contains 2.0*10^-3 M Pb^2+ and 1.0*10^-4 M Cu^+. I^- is added to the solution little by little, will CuI (Ksp=1.0*10^-12) or PbI2 (Ksp=7.9*10^-9) precipitate first? Determine the concentration of I^- required to commence precipitation o..
As the liquid vaporizes the plunger is pushed out. At equilibrium, the plunger reads 6.51 mL of gas. Atmospheric pressure is 740. mmHg. What is the approximate molar mass of the compound (in g/mol)?
what mass of cacl2 when dissolved in 100.00 g of water gives an expected freezing point of 5.0degc cacl2 is ionic?
Wpump = 1500 kJ/h = 0.42 kW Qboil = 2.59 x 106 kJ/h = 718.7 kW Wturb = -227,300 kJ/h = -63.1 kW Qcond = -2.36 x 106 kJ/h = -656 kW What is the efficiency of the engine? How should we define it?
What is the cellular free energy change for the phosphofructokinase reaction at 37°C? c) What is the equilibrium constant for the phosphofructokinase reaction
Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients. [silver nitrate and cobalt(II) iodide]
What is the heat kcal released when 50.0 g of water at 100 degrees C hits the skin and cools to a body temperature of 37 degrees C
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