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Which of these names and formulae do NOT match correctly. 1. N2O4 : dinitrogen tetroxide 2. MgF2 : magnesium ?uoride 3. HgCl : mercury (II) chloride 4. SF6 : sulfur hexa?uoride 5. Fe(NO3)3 : iron (III) nitrate
A solution contains Cr3+ ion and Mg2+ ion. The addition of 1.00 L of 1.55M NaF solution is required to cause the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 50.2g.
The flask was then shaken until the solution was uniform. A 30.0-\rm mL sample of this glucose solution was diluted to 0.500 \rm L. How many grams of glucose are in 100. \rm mL of the final solution
Assuming that at some time the concentration of potassium tartrate is twice as high as that of tartaric acid, calculate the pH of the wine. The pKa of tartaric acid is 2.96.
explain how the leaving group leaves and the nucleophile attacks the carbon? What is an example explanation and what do I include in the explanation?
The molar stoichiometric ratio of nitrogen produced to ammonia reacted in the reaction equation is one to one, and the mol CO2/mol C6H12O6 = 2. How much (in g mol) (a) glycerol was produced and (b) how much biomass reacted to produce the 52.4 L of..
An unknown mass of each of sand, initially at 24.0, absorbs 1970 of heat. The final temperature is 62.2 degrees C. Find the mass of sand.
why is the identity of an element determined by the number of protons in its nucleus? why cant the identity be
A titration required 18.38 mL of 0.1574 M NaOH solution. How many moles of NaOH were in this volume?
The solubility of benzoic acid at 0oC is 1.7g/L and at 90oC is 45.5g/L. How much water do you need to dissolve 0.455 g of benzoic acid at 90oC. How much of the original benzoic acid will remain in the solution once the temperature is reduced to 0o..
The mass of the displaced fluid is equal to the mass of the object in air, 50.0 g, minus the apparent mass of the object in the fluid, 5.6 g: What is the mass of the displaced water
For 2.25 moles of an ideal gas, Pext=P=200x10^3 Pa. The temperature is changed from 122 C to 28.5C and Cv=3R/2. Calculate the q, w, delta U and delta H for an isochloric process.
This is for two dimensional arrays with both positive and negations ions alternating in a square pattern. I am given the hint to select an area with boundries through the middle of the outermost ions-ie the edge ions count as 1/2
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