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Q.1) Given a saturated solution of calcium carbonate ( atequilibrium ) how many moles of calcium ion will remain insolution after the addition of 3.16x10^-4 M of Na2co3 at 25C?(Assume PH is constant)
(Q.2) if the PH of finished water from a softening process is10.74, wahat amount of 0.02000 N sulfuric acid (mm) is required toneutralize 1.000 L of the finished water? (Assume bufferingcapacity is zero )
(Q.3) Convert the following concentration :
a) 0.2500 M NaOH to mg/L
b) 0.0704 M Na2SO4 to mg/L
c) 85.05 mg/L Ca(HCO3)2 to mg/L as CaCO3
d) 40.00 mg/L as CaCO3 to mg/L Cl-
a 4ft-long, 1-in-diameter shaft rotates inside an equally long cylinder that is 1.02 in. in diameter. Calculate the torque required to rotate the inner shaft at 2000 rpm if SAE-30 oil at 70 degrees F fills the gap
A gas containing 80% CH4 and 20% (by mole) He is sent through a quartz diffusion tube to recover the He. 20% by weight of the original gas is recovered and its composition is 50% He.
A soil is to be compacted on a site and it is expected that the soil contains a high percentage of montmorillonite. Briefly explain the working principles of two tests that can be carried out to ascertain the presence of montmorillonite in the soil.
what is a dummy activity and slack activity and also what are slack variables in linear programming constraints equation
Consider some hypothetical X+ - Y - ion pair for which the equilibrium interionic spacing and bonding energy values are 0.38 nm and - 6.38 eV respectively. If it is known that n in the equation has a value of 10
Determine the basin dimensions (width, length, depth) for a detention time of 3 hours and a length to width ratio of 4 to 1. (use English units)
If it is known that the value of the stress exponent, n, for this alloy is 8, compute the steady-stare creep rate at 1300 K and a stress level of 90 MPa.
how much water horsepower is required to pump 380 gpm against a total head of 420 feet. If the efficiency in the above problem is 85 percent and the pump efficiency is 80 percent. Calculate the required horsepower.
Niagra falls measures 160 feet in height. Based on reasonable assumptions estimate the change in entropy for the water from the top of the falls to the bottom in kJ/kg*K.
Neon gas at 50 degrees C in a vertical cylinder of diameter 150 mm has a 6 kg frictionless piston mounted. The outside pressure is 98kPa and the neon volume is 4000cm^3. Find the mass of neon.
A horizontal curve on a two-lane highway is designed with a 818.51ft radius, 12ft lane, superelevation 6.4%, and a 50mph design speed. Deflection angle is 90 degree.
An emf of 22.0 mV is induced in a495 turn coil when the current is changingat a rate of 5.0 A/s. What is the magneticflux through each turn of the coil at an instant when the currentis 1.00 A
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