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A certain elementXhas four isotopes.
What is the average atomic mass of elementX?
1.using a sample of 21.2 ml of a weak monoprotic acid hx requires 50.0 ml of 0.045 m sodium hydroxide to reach to the
How much heat (in kJ ) is required to warm 12.0 grams of ice, initially at -12.0 Celsius, to steam at 112.0 Celsius? The heat capacity of ice is 2.09 J/g*Celsius and that of steam is 2.01 J/g*Celsius?
What is the pH of a buffer that is 0.50 M NH3 (pKb = 4.75) and 0.20 M NH4Cl after 50 mL of 0.2 M HCl is added to the 1 L solution
The procedure calls for the addition of 7-8 drops of aqueous NaOH. What is the purpose of the base here? Be specific and show the reaction that occurs
List the species in order of increasing bond energy and in order of increasing bond length. S22-, S2-, S2, S2+, S22+
Iodine tricholoride, ICI3, will react with a chloride ion to form ICI4-. Which species, if any, acts as a Lewis acid this reaction
Density of liquid methanol, Determine the density of liquid methanol in (lb/ft^3) and convert heat capacity, thermal conductivity and viscosity from SI units to English Units.
nitric oxide no reacts with oxygen gas to form nitrogen dioxide.in one experiment 0.865 mol of no is mixed with 0.502
when the base was 0.292 M and the cation was 1.89 M. Calculate the equilibrium dissociation constant (Kb).
At constant pressure, in which of the reactions is work done by the system on the surroundings? By the surroundings on the system? In which of them is no work done?
sodium reacts with hydrogen gas. how many grams of sodium are needed to react with 2.50 l of hydrogen measured at stp?
Which is the best counter ion of metal (II) -bpy complexes on the yields of aldol condensation of benzaldehyde with acetone. It would be helpful if you can provide some extra material for this topic
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