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What is the molarity of a HCl solution if the reaction of 200mL of the solution with excess CaCO3 produces 10.5L of Co2 gas at 725mmHg and 18C?Equation: CaCO3(s)+2HCl(aq)-->CaCl2(aq)+H2O(l)+CO2(g)
What is the mass in grams of 2.75 moles of CH4, How many moles are in 365 grams of K2SO4.
An aqueous solution of unoxygenated hemoglobin containing 5 g of protein (M= 64000 g/mol) in the 100cm3 of solution is placed in an insulated vessel.
4NH3 + 5O2 yields 4NO + 6H2O Given 1.50g of NH3 reacts with 2.75g of O2 which is the limiting reactant?
Calculate Ka and Original Concentration of Weak Base, You have a solution of a weak base, the pH of which is 10.7532. If 10.000 mL of this solution will neutralize 6.655 mL of 0.07667
Complete the following equations in molecular form. The reactant coefficients are correct. Indicate precipitation, redox, or acid – base. Write the equations in NET ionic form (no spectator s). Balance charges and use the correct suffixes.
At an altitude of 45.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?
The volume of a drop of rain was found to be 0.448 ml at N.T.P. How many molecules of water and number of atoms of hydrogen are present in this drop.
The dipole moment of SO2 and CO2 are 5.37x10-30 C.m and zero, respectively. What can be said about the shapes of the two molecules.
What are some reasons why there would be a difference between the expected and actual values for the moles of copper oxide produced from heating copper in the air.
Calculate the number of grams of H2 formed If the wet Hydrogen gas formed occupies a volume of 9.67 Litres
A total of sixteen grams of steam at the temperature of 120 degree Celsius is admitted to the system. Determine the phase composition and temperature at the time when equilibrium is reestablished?
What mass of solid sodium formate (of MW 68.01) must be added to 140 mL of 0.3 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 3.77? Ka = 0.00018 for HCOOH.
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