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Zn(OH)2 solid (molecular mass = 99.41 amu) is added to 0.400 L of0.550 M HBr. The mass (in mg) of Zn(OH)2that was originally added was numerically?
The same container filled with carbon dioxide at STP has a mass of 37.440 g. A gas cylinder filled with nitrogen at STP has a mass of 37.289 g. When filled with an unknown gas at STP, the container
Suppose you are given 20.0mL of a suspension of bacteria which is having 5 x 10^7 organisms/mL. Calculate and diagram a scheme to dilute this to 1 x 10^2 organisms/mL in a final volume of 1.0mL in t
The solution boiled at 56.12°C. The boiling point of pure acetone is 55.95°C and its Kb = 1.71°C/molal. A solution was made by dissolving 4.50 grams of a nonvolatile solute in 100.0
Determine the mass of precipitate that produces when the 300ML of a aqueous solution containing 67.9g of silver nitrate reacts with excess sodium chloride solution by the following reaction:
Discuss how photochemical isomerization allows the production of the thermodynamically less stable cis isomer. Discuss why is the trans isomer exclusively converted to the cis isomer during
Suggest a suitable mechanism for this reaction when the Benzyl bromide (C6H5CH2Br) can be prepared by treating toluene with the NBS in the presence of a peroxide initiator.
Determine the wavelength of a photon emitted by a hydrogen atom when its electron drops from the n =4 state to the n =3 state. Explain in details.
An experiment was done where in the 3.25grams of O2 were reacted with excess theH2 to form the water. The chemical equation is O2+2H2 yields 2H2O.
Calculate the chemical structure of a phospholipids molecule and describe how this structure leads to the formation of membranes when phospholipids are placed in water?
Calculate the molecular formula and its correct molecular weight when an unknown substance is empirically determined to be 6.67 % hydrogen, 40 % carbon by weight and the 53.33 % oxygen. Its
Discuss how do you minimize bias when conducting a project? Determines the dependent and independent variables? What are the different ways variables may be arranged (2-factor, nested, etc
Explain the biological importance of each of the following organic compounds in relation to cellular structure and function in plants and animals.
If 51.6 g of CS2 yields57.7 g of CCl4, what is the percent yield when the carbon disulfide (CS2) reacts with excess chlorine (Cl2) to form carbon tetrachloride (CCl4) and disulfur dichloride (S2C
Determine the final temperature of the system once equilibrium has been reached when a mass of 20.0g of H2O(g) at 373k is flowed into the 250g of H2O(l) at 300k 1 atm. Assume that Cp, m for H2
A sample of a compound of O and Cl reacts with an excess of H2 to give .233grams of HCl and .403 grams of H2O. Calculate the empirical formula of a compound?
The heat capacity Ca(OH)2(s) is 19.2 cal/mol*degree Celsius and the heat of vaporization of water is 540 cal/g. Explain how much liquid water and how much steam would result?
What was the concentration of Li2S in the original undiluted solution when a 11 mL sample of a solution of Li2S was diluted with water to 77 mL. A 60 mL sample of the dilute solution was found to cont
A certain anesthetic contains 64.9 percent C, 13.5 percent H, and 21.6 percent O by mass. At 120°C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g. What is the molecular form
Determine the mass of the solid NH4CL produced when the 7.30g of NH3 are mixed with an equal mass of HCL?
A 4.00g sample of a hydrate of nickel (III) bromide losses 0.793g of water when leated. Calculate the mass percentage of water in the hydrate and the formula of the hydrate.
Four liters of liquid n-heptanes and five liters of n-hexane are mixed and burned with the 4000 gram moles of air. Not all of the hydrocarbons are burned in the furnace, and both CO and CO2 are form
A factory produces an aqueous waste that contains 20 mg/L calcium and collects the waste in 44gallon drums. One EDTA complexes one metal atom. Explain what mass of EDTA(C10N2O8H16) would require to
Determine the numbers of moles of carbon dioxide is contained in a 240.-mL can of the soft drink? A soft drink is made by dissolving the carbon dioxide gas at 3.00 at min a flavored sugar solution
What products would you expect to form when tetrahydrofuran is treated with excess hydroponic acid (HI ) if 3-bromo-1-propanol is treated with NaOH, a compound of molecular formula C3H6O is formed.