How to obtain the concentration of compound in sample
Suppose after developing the color of your unknown compound, the Spec 20 cannot measure the absorbance, it is too high. How could you obtain the concentration of Cr(NO3)3 in your sample? Please be clear and specific.
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An elastic cord is 74 cm long when a weight of 70 N hangs from it but is 85 cm long when a weight of 200 N hangs from it? What is the spring constant of the elastic cord?
A calorimeter containing 75 grams of water ai 18 degrees celcius. the water and metal object reach a final temperature of 22 degrees celcius? what is the metal?
Calculate the volume of 6.15% (mass solute/volume solution) sodium hypochlorite ("bleach") that will be required to make 250 mL of 0.500 M sodium hypochlorite.
A 91.0-kg person stands on a scale in an elevator. What is the apparent weight in each of the following situations? (a) when the elevator is accelerating upward with an acceleration of 1.30 m/s2
Suppose after developing the color of your unknown compound, the Spec 20 cannot measure the absorbance, it is too high. How could you obtain the concentration of Cr(NO3)3 in your sample?
The temperature of a 35.2 g sample of iron increases from 23.7 °C to 29.5 °C. If the specific heat of iron is 0.450 J/g-K, how many joules of heat are absorbed?
(a) Calculate the frequency of the damped oscillation. (b) By what percentage does the amplitude of the oscillation decrease in each cycle? (c) Find the time interval that ellapses while the energy of the system drops to 2.00% of it's initial valu
A steel cylinder is filled with 5.75 mol of nitrogen at 22degrees Celcius. The volume of the cyclinder is 18.4 L Calculate pressure inside the cylinder
A 295- flask contains pure helium at a pressure of 751 . A second flask with a volume of 495 contains pure argon at a pressure of 712 . If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of
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