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It is possible to write four resonance structures for the azide ion, N3-, all of which satisfy the octet rule (write them all). However, experiential evidence shows that the azide ion has linear shape, with equal nitrogen-nitrogen distances. Which lewis structure of N3- best represents this observation?
The atmospheric activity of 14 C is 15 cpm/gC (counts per minute per gram of carbon). Assume that the cloth was made in the year 24 B.C. The half-life of 14 C is 5730 years. What will be the expected activity of 14 C of this sample
which ions in water make it 'hard'? is it possible to test for only one of these ions quantitatively in the presence of the other.
Direct reaction of sodium metal with O2(g) leads to sodium peroxide, Na2O2, which contains a peroxide complex anion and is diamagnetic. Direct reaction of potassium metal with O2(g) leads to potassium superoxide, KO2, which contains a superoxide c..
A buffer is to be prepared by adding solid sodium acetate to 0.10 M CH3COOH. Which of the following concentrations of sodium acetate will produce the most effective buffer
Your metropolitan area has been warned by the EPA to lower sulfur dioxide and nitrogen oxide emissions or it will lose substantial federal funding. One citizen's group calls for conservation as a means of drastically reducing electricity consumption.
What mass of NaN3(s) must be reacted in order to inflate an air bag to 74.6 L at STP?
Calculate the equilibrium concentration of HC2O4- in a 0.20 M solution of oxalic acid.
How many grams of O2 are needed to react with 20.9 grams of Mg?
If 500ml of a solution containing 1.00g of barium nitrate (199.33 g/mol) is combined with 500 ml of a soluiton containing 1.00g of sodium sulfate
Give a set of variables that is sufficient to specify the thermodynamic state a homogeneous pure substance
A 245 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.088 M in NH4Cl
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