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An isolated system is divided into 2 parts by a rigid, impermeable, thermally conducting wall. Let heat q1 flow into part 1. Use the first law to show that the heat flow for part 2 must be q2 = - q1
What is the strength of the ionic interactions between an ion with 2 positive charges and an ion with 1 negative charges, when the distance between them is 15.5 nanometers and the solvent is benzene, with a dielectric constant of 4.6?
there are 1.699E22 atoms in 1.000 g of chlorine. Assume that chlorine atoms are spheres of radius 0.99 Å (Angstrom) and that they are lined up side by side. How many miles in length is the line of chlorine atoms? *
Pb(NO3)2 + 2 NaI = PbI2 + 2 NaNO3
6.Suppose in the reaction in which 100 grams of lead(II) nitrate were all used up and only 100 grams of lead(II)iodide were obtained in the experiment, what is the percent yield?
7.How many grams of the product were formed in no. 6 if the percent yield is 80%?
Pb(NO3)2 + 2 NaI = PbI2 + 2 NaNO3
Suppose in the reaction in which 100 grams of lead(II) nitrate were all used up and only 100 grams of lead(II)iodide were obtained in the experiment, what is the percent yield?
Pb(NO3)2 + 2 NaI à PbI2 + 2 NaNO3
If 100 grams of lead (II) nitrate were used in the reaction, how many grams of sodium iodide were used for a complete reaction?
Pb(NO3)2 + 2 NaI = PbI2 + 2 NaNO3
How many moles of lead (II) iodide were produced when 5 moles of lead (II)nitrate were used in the reaction?
Pb(NO3)2 + 2 NaI = PbI2 + 2 NaNO3
How many moles of lead (II) nitrate are needed to react completely with 10 moles of sodium iodide?
How will you compare it with the heat needed by alcohol with molar heat of vaporization 44.0 kJ at 35.0 g and boils at 82.5°C? Note that the molar mass of isopropyl alcohol is 60.1 g/mol.
1) A 1.0 g of protein hemoglobin is dissolved in enough water to make 200 mL of solution. The osmotic pressure of the solution is measured at 25 0C and found to be 1.35 mmHg. What is the molecular weight of the hemoglobin?
2) What is the osmotic pressure of a solution made up of 15 g of salt, NaCl, in 250 mL of solution at 27 0C?
