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A chemist takes 22.1 mL of a solution containing dissolved copper at a concentration of 31 mg of copper per mL of solution. The chemist then initiates a reaction in the solution that causes all of the copper to form a precipitate (form a solid) that settles to the bottom of the container. What should be the mass (in grams) of the copper precipitate?
Given: 0.250L of 0.575M Pb(NO3)2 solution mixed with 0.300L of 0.822M NaOH at 25c. Determine if a precipitate forms. Calculated the concentrations to be 0.144 mol of Pb(NO3)2 and 0.247 mol of NaOH. What do I do from here
Based on the Henderson-Hassalbach equation how many mmols of Tris-HCl are there in a 100 mL of a 100 mM Tris-HCl buffer solution at pH 8.1? Note that the 100 mM refers to the sum of Tris and Tris-HCl concentrations.
Consider a 'standing wave' represented by a superposition of travelling wave amplitude functions A (x) = AoExp[i k x] - AoExp[-i k x] where the parameter "k" now is allowed to be any positive real number (that is k has the same magnitude in each c..
The solvent for an organic reaction is prepared by mixing 60.0 mL of acetone with 45.0 mL of ethyl acetate. This mixture is stored at 25.0C. The vapor pressure and the densities for the two pure components at 25.0C. What is the vapor pressure of t..
The threshold frequency of dislodging an electron from a zinc metal surface is 8.54x10^14 Hz. Calculate the minimum amount of energy required to remove an electron from zinc surface.
Molybdenum crystallizes in a body-centered cubic lattice (the Mo atoms are at the lattice points only). If the density of the metal is 10.3 g/cm3, what is the unit cell edge length in pm?
The atomic number of an element X is 14,and its relative atomic mass is 28. How many neutrons does an atom of X contain? What is the electronic distribution in an atom of X? will X react in an electro-valent or covalent manner? Give reasons for yo..
Intended for the skeletal chemical equation C2 H4(g) + O2(g) = CO2 (g) + H2O(g). Define what is the coefficient of C2H4 in the balanced equation
What volume will it occupy at each of the following temperatures if the pressure and number of moles are constant
Write the eqn for each large-extent B/L A/B rxn which occurred on making this mixture. Do this by starting with the rxn that involves the strongest B/L A with the strongest B/L B. Label this rxn (i). Continue writing eqns in this "strength order" ..
1 the reaction of aluminum and potassium hydroxide isgiven below als koh 3h2o -----gtkaq aloh4 - 32 h2g a how many
calculate the absorbance of a solution containing 3.70×10-5 M R and 5.64×10-4 M Q at 560 nm. Assume 1.00 cm cells for all data given.
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