What is the total hardness of the solution expressed
30 mg of calcium ( Ca2+ ) and 50 mg ofMagnesium ( Mg2+ ) are dissolved in 0.5 L of water.What is the total hardness of the solution expressed in mg/L asCaCO3?
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Determine how long it will take to vaporize all the liquid in the tank. Also, show the process on a T-v diagram with respect to the saturation curve.
What is the z-score for a blood pressure reading of 140? The proportion with high blood pressure is ? What proportion of the populatin has systolic blood pressure in the range from 98 to 140? Find the 90th percentile blood pressure readings.
Explian why melting points are important in ochem. think about how you can identify a compound.? Explian why reflux is an important techniques in ochem.Think about energy needed to carry out a reaction?
To prepare a buffer pH= 4.0 using formic acid (pKa= 3.75), what is the molar ratio needed between the free acid and the conjugated base?
The table below shows the typical mass of eight animals. Plot and label these values on a log scale.
A 270-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal.
The population of a colony of rabbits grows exponentially. The colony begins with 10 rabbits; five years later there are 340 rabbits. Give a formula for the population of the colony of rabbits as a function of the time.
What is the Reynolds number of the water at 20c flowing at 0.25m/s through 5mm diameter tube? If the pipe now heated, at what mean the water temperature will the flow transition to turbulence?
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