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Iron has a density of 7.874. g/cm3. What is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000 cm by 5.000 cm?
What volume (in mL) will it occupy at the same pressure and 277 K? Round your answer to zero places past the decimal.
Ethanethiol is more soluble in water because sulfer has agreater electronegativity value than oxygen. Ethanethiol is more soluble in water because it has a lower molecular mass than 1-propanol.
When caffeine is treated with HCl what solvent is the resulting compound more soluble in? Methylene chloride, chloroform, or water When carboxylic acid is treated with a base such as NaOH
Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in Appendix 3. (?H°f (HgO(s)) = -90.7 kJ/mol and ?H°f (FeO(s)) = -272 kJ/mol.)
What must the concentration be, of each member of the buffering acid/base pair, if the reaction is expected to release 0.1 millimoles of H+?
Suppose 5.00g of Ca is added to 50.0mL of 1.00M HCL. Determine the limiting reactant in this case and number of moles of calcium actually consumed.
What is the molarity of sucrose, C12H22O11, that contains 125 g of sucrosein 3.50L of solution?
The hemoglobin of blood, a protein, is known to contain 0.335% iron by mass, Structural evidence indicates that there are four atoms of iron per molecule
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L^-1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L^-1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass..
The reaction takes place in a bomb calorimeter where 4.50g of glucose are burned. What is the heat capacity of the bomb if the temp. of the water in the bomb increases from 22.75 degrees Celsius to 25.32 degrees Celsius? I used qrxn = -Ccal*change..
The dried precipitate weighs 10.3g. Calculate the amunt of MgCl2 in the original sample (in weight percent).
What is the approximate value of the equilibrium constant, Kn, for the neutralization of hydrochloric acid with sodium hydroxide, shown in the equation below? HCL(aq) + NaOH(aq) --> H2O (l) + NaCl (aq)
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