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1 mol of sand grains would cover the state of Texas to several feet. Approximate to how many feet assuming the sand grains are roughly cube shaped each one with an edge length of .10 mm. Texas has a land area of 268,601 square miles.
a gas sample containing 1.56 mol at 25degc exerts a pressure of 394 torr. some gas is added to the same container and
Find the average value of the electron-nucleus seperationin a hydrogen like atom in the 2pz (ml=0) state.
Calculate the PH of this solution.
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 16.8g of carbon were burned in the presence of 57.4g of oxygen, 12.6g of oxygen remained unreacted. What mass of carbon dioxide was produced
Draw molecular structure of the following compounds. Identify the : paraffins, olefins, alkynes, naphthenes,and aromatics.
A microwave oven operates at 2.40 . What is the wavelength of the radiation produced by this appliance?
the original volume is 70. cm3. if the combustion of this mixture releases 855 j of energy to what volume will the
Complete and balance the following redox equation. What is the coefficient of H2O when the equation is balanced using the set of smallest while-number coefficients. MnO4^- + SO3^2- ---> Mn^2+ + SO4^2- (acidic solution)
Glycine can be obtained in three forms (differing in charge and conjugate ions): (a) glycine hydrochloride, (b) isoelectric glycine (sometimes called glycine, free base), and (c) sodium glycinate. Draw the structures of these three forms.
Calculate the concentrations of NH4+ and NH3 and the pH in a solution prepared by mixing 22.0g of NaOH and 0.500L of 1.5 M NH4Cl. Assume that the volume remains constant.
The recommended daily dietary intake of calcium for adult men and pre-menopausal women is 1100 mg/day Calcium citrate , Ca3(C6H5O7)2. What mass of calcium citrate would be needed to provide the recommended daily intake of calcium
Assume a 95% yield for the formation of the phosphonium ion, how many milligrams of benzyl chloride and triphenyl phosphine would you need to prepare 220 mg of benzyltriphenylphosphonium chloride?
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