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The Menthol extracted from pepper mint oil which is a flavoring agent and it contains the C, H, and O. In one combustion analysis, 10.00 mg of the substance yields 11.53 mg H2O and 28.16mg CO2. Dete
Determine the numbers of molecules of ethane are contained in the 25.0 mL of butane? Butane having the density is 0.6011g/mL and the molar mass 58.12 g/mol.
Calculate the mass of hydrogen gas that produced when a 9.35 g chunk of zinc dissolves in the 525 mL of 0.500 MHCl?
250 mL of a solution is prepared from the water and 22.1 mL of a98.0% H2SO4 solution (d =1.84g/ml). Determine the resulting molarity.
A rock sample which is taken from the Australia was found to contain 0.438 g of Pb-206 to every 1.00 g of U-238. Assuming that all lead-206 created from the decay of U-238, discuss how old is the r
Determine the molar mass of a compound if 0.372 mole of it has a mass of 152 g. Calculate the mass in the grams of a single atom of each of the following elements: As, Ne, Ni, Hg?
Determine the numbers of gold (Au) are there in 15.3 moles of Au? Determine the numbers of molecules of ethane (C2H6) are present in 0.334 g of C2H6?
Calculate the number of moles of the HCl that can be neutralized by an over the counter an antacid tablet that are contains the 400mg Al(OH)2?
In the world the poor person are often uninformed and uneducated about knowing the environmental issues. What is the mean of this the poor would cause the greater environmental degradation? Describe
Can you explain that the population be adequately addressed by the ever advancing technology or science do the numbers eventually overwhelm the environment?
Calculate the pH range of a buffered solution that is composed of equal molar concentrations of acetic acid and the acetate? (Ka= 1.8x 10-5)
Cinnamicalcohol is used mainly in perfumery. Particularly in soaps and cosmetics. Its molecular formula is C9H10O
The mixture containing 0.477 mol Hg(g), 0.280mole Ne(g) and 0.110mol Ar(g) is confined in a 7.00L vessel at 25C
For the reaction A ----> B + C, the rate law is rate =k[A]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into the products, Determine the value of the rate cons
Research shows that it takes 1656 kJ/mol to break all the bounds in methane ( CH4) and 4006 KJ/mol to break all the bonds in propane(C3H8). Determine the average bound enthalpy of c-c bond&nb
To neutralize the stomach acid a Rolaids tablet contains the calcium carbonate. If 44.55 mL of 0.448 M hydrochloric acid is needed to neutralize a single tablet, determine the numbers of milligrams
Kucharel polymer is prepared by heating the dimethylester that is derived from the cyclohexane-1, 4-dicarboxylic acid with the ehyleneglycol. Find out the repeating unit in Kucharel? Also mention t
A 10.0 mL sample of household ammonia solution needed the 38.50 mL of 0.311 M HCl to get the neutralization. Determine the molar concentration of the ammonia solution.
Toothpaste having the 0.24% sodium fluoride NaF and 0.30% of triclosanC12H7Cl3O2. A single tube contains the 119 grams of toothpaste.
The rock in a particular iron ore deposit contains 83 %Fe2O3 by mass. Determine the number of kilograms of the rock must be processed to obtain the 1300 kg of iron?
Fingernail-polish remover is primarily acetone (C3H6O). Determine the numbers of acetone molecules are in a bottle of acetone with a volume of 405 mL? (the density of acetone =0.788 g/cm3 ).
The 4.78-g sample of aluminum totally reacts with the oxygen to outline the 6.67 g of aluminum oxide. Use this data to determine the mass percent composition of aluminum in the aluminum oxide.
The 1.45 g sample of phosphorus burns in the air and outlines the 2.57 g of a phosphorus oxide. Describe the empirical formula of the oxide. Express your answer in detail as a chemical formula.
Determine the numbers of calcium are needed to react with the 1.55g of water to make the calcium hydroxide and the hydrogen gas?
Determine the number of moles in 75.5g ofAl2O3, Determine the mass in grams of one molecule of CBr4