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for a hydrogen atom calculate the wavelength in nm of an emitted photon in the lyman series that results from the transition n 3 to n
which category matches with caoh2 - a it is a lewis acid - b it is a diprotic br0nsted acid - c it is a
a solid substance with a mass of 200g is at its melting temperature in a calorimeter while the substance changes from a solid to a liquid at the same
naoh k2cr2o7 ---gt hco nahco3 ---gt hco naoh ---gt cuso4 naoh ---gt ch3cooh nahco3
1 a 100 ml 04m acetic acid soln is titrated with 05m naoh write a reaction equation to work the following a what volume of the base would be
p 105atm v 206l t 298k p 521atm v 615 t what is
Table salt (NaCl) and sugar (C12H22O11) are accidentally mixed A 5.00g sample is burned and 2.20-g of CO2 are produced. What is the mass percentage of the table salt in the mixture?
Chemists studied the formation of phosgene by sealing 1.00 atm of carbon monoxide and 1.06 atm of chlorine in a reactor at a certain temperature. The pressure dropped smoothly to 1.35 atm as the sys
Why do firefighters recommend the use of a deluging volume of water when extinguishing an oxidizer-supported fire? What may happen to a large (i.e., 30-50lb) container of trichloro-s-triazinetrione
Assuming that radiation with λ=15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 °C, how many photons a
What is the most likely reason OSHA requires ammonium nitrate to be segregated for sulfur or finely divided metals? Explain your answer.
A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2.
The mineral pyrolusite is a compound of 55Mn and 16O. If 63% of the mass of pyrolusite is due to manganese, what is the empirical formula of pyrolusite?
A typical gas cylinder, contains 1.55 cubic feet of gas compressed at 2,200 pounds per square inch. what volume would the gas occupy at normal atmospheric pressure and the same temperature?
A 350. mL solution of 0.150 M HNO3(aq) is mixed with a solution of 230. mL of 0.240 M HCl(aq). How many moles of H+(aq) are present in the final solution?
By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of acetone is 0.790g cm^-3. Calculate the mass of acetone the student should weigh out.
A sample of impure magnesium was analyzed by allowing it to react with excess HCl solution:Mg(s) + 2HCl(aq) => MgCl2(aq) + H2(g)After 1.32 g of the impure metal was treated with 0.100 L of 0.750
One method of estimating the temperature of the center. If the density of the center of the sun is 1.40 g/cm3 at a pressure of 1.30 × 109 atm, calculate the temperature.
Vitamin C is a compound that contains only C, H and O. It& ; has a molar mass of 176.12 g/mol. When a 1.000 g& ; sample is burned, 1.50 g of CO2 and 0.410 g of water are& ; collected after complete
If 125 cal of heat is applied to a 60.0-g piece of copper at 20.0°C , what will the final temperature be? The specific heat of copper is 0.0920 cal/(g⋅°C) .
If iron is oxidized to Fe2+ by a copper(II) sulfate solution, and 0.415 grams of iron and 13.2 mL of 0.538M copper(II) sulfate react to form as much product as possible, how many millimoles (mmol) o
At 0 C, the volume of the gas is 361 mL. To what temperature must the gas be heated to occupy a volume of 492 mL?
A 126 piece of metal is heated to 285 and dropped into 83.0 of water at 26. If the final temperature of the water and metal is 58.3, what is the specific heat of the metal?
If 18.0mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia?