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A 0.0571g sample of platinum sulfate was dissolved in dilute HCl and treated with 10% BaCl2 solution. The BaSO4 precipitate weighed 0.0801g. Determine the formula of this sulfate of platinum. The atomic number of platinum Pt, is 78.
How are you suppose to remember all the rules for these compounds? And how will you know when to apply them in a certain problem?
Explain the following situations based on your gas solubility knowledge. a. It is a warm day and a manufacturing plant accidently spills heated wastewater into the White River. Dead fish are seen downstream from the plant.
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.15×1014 {rm s^{-1}} when it is exposed to visible light of wavelength 4.76×10-7 {rm m}.
A student prepares a buffer by dissolving solid sodium acetate, NaCH3COO, in a solution of acetic acid, CH3COOH. Write the net ionic equation for the buffer system.
If 8.00 kJ of heat are added to 200. g of water at 20.0 C, what is the final temperature of the water?
Propanoic acid, HC3H5O2, ionizes in water and has a Ka=1.34x10^-5. What is value of Kb for the propanoate ion
Fluorine-18, which has a half-life of 110 min, is used in PET scans. If 123 mg of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.?
Determine what concentration of OH - is needed to dissolve 0.015 mol of Zn(OH) 2 zinc hydroxide in a liter of solution
Assuming that the limits of the visible spectrum are approximately 380-700nm, find the angular range of the first-order and second-order visible spectrum produced by a plane grating that has 900 grooves/mm with the incident source radiation normal..
If one pipet volume of each of the following pipets (2, 5, 10 mL) of a 2.56x10-1 M sample are added to a 25 mL volumetric flask and it is filled to the line with water and well mixed, what is the concentration of the resulting solution?
The density of the hydrogen peroxide solution is 1.01 g/mL and the solution contains 3.40% H202 by mass. The vapor pressure of water at 24C is 22 mmHg. Based on this data and information calculate the molar volume at STP.
A student measured the wavelength of hydrogen's visible red spectral line to be 647 nanometers. Which is a correct numerical setup for calculating the student's percent error.
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