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Given that the dominant isotope mass for copper metal is 62.94 amu (g/mol) how many atoms of copper metal are in a pure copper coin that weighs 2.15g
The absorption for an internal alkyne will be more intense than the absorption for a terminal alkyne.
Question- Were the advertising claims of the low alkalinity shampoo verified when compared with the ordinary shampoo? Explain. (Shampoo, low alkalinity pH of material 5, and Shampoo, ordinary, pH material of 7).
Strontium metal crystallizes in a cubic unit cell which has an edge length of 612 pm. If the mass of an atom of Sr is 87.62 amu, and the density of Sr metal is 2.54 g/cm3
2NO2 + Cl2 = 2NOCl The inital pressure of NO2 was 1.577 atm and the inital pressure of Cl2 was 0.427 atm. At equilibrium, the partial pressure of NOCl is 0.624 atm. Calculate K.
how much heat is released as the temperature of 12.7 grams of copper tubing is decreased from 94.7degc to 43.2degc? the
A reagent bottle on the shelf labeled 0.5 M NaCl was used in place of the 0.5 M CaCl2. Assuming C2O42- to be in excess, what would be observed as a result of using this reagent in this test
A 529-\rm mL sample of unknown \rm HCl solution reacts completely with \rm Na_2CO_3 to form 20.1g \rm CO_2. What was the concentration of the \rm HCl solution
During a titration, a student used 31.92 ml of a .1000 M NaOH (aq) to neutralize 30.0 ml of a . 2488 M oxalic acid solution. a. Write the balanced equation for the neutralization reaction ( you need the formula of oxalic acid)!
Problem- A solution is made by mixing 36.0 mL of ethanol, C2H6O, and 64.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C
a question about an organic chemistry lab report. I am synthesizing aspirin (acetylsalicylic acid) using salicylic acid, acetic anhydride, and a catalyst.
Upon reaction with excess sulfamic acid, HSO3NH2, a 0.121g sample of a mixture of sodium nitrite, NaNO2, and sodium chloride, NaCl, produced 28.3 mL of nitrogen gas collected over water at 25.3 degrees Celsius and at a barometric pressure of 738 m..
CS2(l) + 3O2(g) -> CO2(g) + 2SO2(g) What volume of O2 is required to react with excess CS2 to produce 4.0 L of CO2? Assume all gases are measured at 0oC and 1 atm.
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