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An unknown metal of density 7.65 g/cm^3 occurs in a face centered cubic unit cell. The radius of the atom is 126 pm. What is the metal's atomic mass and what is the metal?
A 4.000-g sample of the metal nitrate M(NO3)2 was dissolved in water and treated with excess aqueous sodium sulfate. The sulfate salt that formed weighed 3.318 g. Determine the identity of the metal.
Consider the reaction of 5.0 moles of CS2 and 3.0 moles of NaOH according to the following reaction 3 CS2 + 6 NaOH -> 2 Na2CS3 + Na2CO3 + 3 H2O.
What mass of NO2 can be produced by the complete reaction of 40.00 g of ammonia with 98.00 g of oxygen: 4NH3 + 7O2 4NO2 + 6H2O
Determine ΔHvap for a compound that has a measured vapor pressure 24.3 torr at 273 K and 135 torr at 325 K: 1. 34 kJ/mol, 2. 13 kJ/mol, 3. 24 kJ/mol, 4. 79 kJ/mol, 5. 41 kJ/mol
if a gas 25.0 c occies 3.60 liters at pressure of 1.00 atm, what will be its volume at a pressure of 2.50 atm
A volume of 80.0 ml of H2O is initially at room temperature (22.0 C). A chilled steel rod at 2.00 C is placed in the water. If the final temperature of the system is 21.1 C , what is the mass of the steel bar?
A 4.867 g sample of a monoprotic acid was dissolved in water. It took 30.24 mL of a 0.1578 M NaOH solution to neutralize the acid. Calculate the molar mass of the acid.
Why does clove oil float on the surface of the aqueous distillate rather than sinking to the bottom?
the empirical formula for acetic acid is ch2o. its molar mass is 60 gmol. the molecular formula isa. c2h4o2b. c2ho2c.
The equilibrium constant of a reaction is 1.04e+02 at 362 K and 2.39e+03 at 465 K. Determine the following for this reaction
the equilibrium constant, Kc, for this reaction is 4.6 x 10^-3. N2O4(g) 2NO2(g). if the equilibrium mixture contains .050 M NO2 what is[N2O4]
How many hemoglobin molecules are there in an average red cell? Assume that the molecular weight of the human hemoglobin tetramer is 65 kd. (The answer is 2.74x10^8, but I don't know how to calculate it)
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