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A sample of 18K gold contains the following by mass: 18.0 grams gold. 3.0 grams silver, and 3.0 grams copper. What is the percentage of gold?
This solution was back-titrated with a .0440 M Ga3+ solution until all the EDTA reacted requiring 14.0 ml of the Ga3+ solution. What was the original concentration of the V3+ solution
If a 0.135g sample of NaCl were placed on an ion-exchange column in the H+ form and the eluate titrated with 0.1231 M NaOH, what volume of the NaOH solution would be required to reach a phenolphthalein end point
Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90º bond angle in it.
draw the lewis structures and determine which of these molecules has a central atom that violates the octet rule.
A typical gauge pressure for optimal performance of automobile tires is 32 lb/in2. What is this pressure in grams per square centimeter
ow many coulombs are required to produce 63.8 g of potassium metal from a sample of molten potassium
At what angle (in degrees) does first-order diffraction from layers of atoms 169.1 pm apart occur, using x rays with a wavelength
What will be the final temperature of the water in an insulated container as the result of passing 4.00g of steam [H2O(g)] at 100.0 Celsius degrees into 100.0g of water at 25.0 Celsius degrees
What are the physical principles behind how they might work? (Hint- there is both thermodynamic as well as light absorption considerations.
The density of acetic acid vapor at the normal boiling point, 118.5 degrees C, is given by 3.15 g/L (normal boiling point is the boiling temperature at P = 1 atm). a) calculate the fraction of the vapor that is monomer and the fraction that is dime..
In an ion, the sum of the oxidation states is equal to the overall ionic charge. Note that the sign of the oxidation states and the number of atoms associated with each oxidation state must be considered.
How many grams of N2 are required to react with 2.30 moles of Mg in the following process?
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