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Copper crystallizes in a face-centered cubic lattice (the Cuatoms are at the lattice points only). If the density of the metalis 8.96 g/cm3, what is the unit cell edge length in pm?
Consider the titration of 15.0 mL of 0.200 M phosphoric acid H3PO4(aq) with 0.200 M sodium hydroxide NaOH (aq). What is/are the major species in solution after the addition of 15.0 mL of the base,Na
If this happens, oxygen masks arereleased. What is the total cabin pressure at which oxygen masksare dropped?
.124 mol of A(g) is allowed to react to form B(g). At 10 seconds 0.110 mole of A is present, at 20 seconds 0.0880 moles of A is present. What is the average rate of disappearance?
In gravimetric analysis of a sample, how does using larger volume improve your total dissolved solid (TDS)rersults? Any downside?
When ammonium nitrate is added to a suspension of magnesium hydroxide in water, the Mg(OH)2 dissolves. Write a netionic equation to show how this occurs. Do not include physicalstates and use t
Assume you are performing the calorimetry step of Expirement 8 and you begin with 40g of water at 20 degrees Celsius and 40g of water at 80 degrees Celsius.
When a person with hypoventilation is placed on aventilator, an air mixture is delivered at pressures that arealternately above the air pressure in the person's lung, and thenbelow. How will this mo
The concentration of iodide (I- ) ions in groundwater isdetermined by first oxidizing I- to I2 and then converting I2 into an intensely colored complex with the dye brilliant green
Most of us are aware that carbon dioxide is a vital gas to sustaining life on Earth. As part of the carbon cycle, animals release CO2 produced from biochemical reactions.
Two solutions namely, 500mL of 0.50M HCl and 500mL of 0.50MNaOH at the same temperature of 22.0 0C are mixed in aconstant pressure calorimeter.
Assume that you have two pumps, one that pumpswater at a rate of 1 liter s-1, the other at a rate of 2liter s-1. For each pump find out how long it would take to reduce the salt concentration from the
For a mercury column barometer tomeasure atmospheric pressure as 760 mm Hg, the column containing the mercury must be completely evacuated.
The net ionic equation for the aqueous neutralization reaction between acetic acid and sodium hydroxide is different from that for the reaction between hydrochloric acid adn sodium hydroxide. Explai
Suppose a mixture contains helium and oxygen gases. If the partial pressure is the same as the partial pressure of oxygen, what do you know about the number of helium atoms compared to the number of
Why is it important to know amount of water in a petroleum product?(i.e. the free water and the dissolved and emulsifiedwater) Why is important to know the amount of water and the amount of sediment
Birds of the order Galliformes (i.e., fowl, pheasant, grouse, quail, & turkey) tend to have relatively light colored breast meat, whereas birds of the order Anseriformes (i.e., ducks and geese)
Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.21 kg of water to lower the freezing point to 98.70 degrees celsius. The molar mass of the compound is 50.0 g/mol an
Would a reaction occur if a piece of Sn metal were placed in a ZnSO4 solution? Briefly explain your answer. Write a net ionic equation if a reaction does occur.
There was no reaction between lead(II) sulfate solution (PbSO4) and Cu metal, but there was a reaction between PbSO4 solution and Zn metal.
Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate. Express your answer as a chemical equation.
Is the buffer capacity exceeded if .480g of solid HaOH isadded to this buffer? What is the pH of the Solution after addition of the NaOH?
Briefly describe how a buffer solution can control the pH of a solution when a strong acid is added. Use the pyrindine (C5H5N/C5H5NH+) buffer as an example. Include a reaction.
Air is about 78.0% nitrogen moleculesand 21.0% oxygen molecules. Several other gases make up there maining 1% of air molecules. What is the partial pressure of oxygen in air at atmospheric pressure
What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.Express your answer numerically in atmospheres.