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A 7.279 gram sample of meat was analyzed for its nitrogen content using kjeldahl method. Upon digestion, the ammonia liberated was collected in 250 ml of 0.855 M H3BO3. The resulting solution was titrated with 37.25 ml of 0.3122 M HCl using mixed indicator. Determine the % protein in the sample using 6.25 as a factor for meat product ?
what is the problem of attempting an Adols condensation using different aldehydes
A tank with a total pressure of 4.7 atm has a mixture of gases that is 72% nitrogen, and the rest is oxygen. What is the partial pressure of the nitrogen? The oxygen?
If 45 g sugar sucrose C12H22O11 is dissolved in .65L H2O, define what is the molality and molarity. As well give the Kf of the solution if the freezing point changed from 0oC to -4.3oCelsius
A solution is prepared from 4.5729g of magnesium chloride and 43.244g of water. The vapor pressure of water above this solution is found to be 0.3628atm at 348.0 K. The vapor pressure of pure water at this temperature is 0.3804 atm.
How many valence electrons are there for the POCl3 molecule? Draw a reasonable Lewis structure for POCl3. Assign formal charges for the atoms in your Lewis structure
How can glycine act as a buffer at pH 6.00 and why? Please use chemical equations to show how it can act as a buffer at this pH specifically?
According to quantum mechanics, all particles of matter exhibit some of the properties normally associated with
Draw a Lewis structure for BrF with an arrow representing that dipole moment. Estimate the percent ionic character of the BrF bond. Which way does the dipole moment point
This was a question on my Mastering Chemistry homework. It's from Tro's Cha: Determine the pH of the following two-component solution: 0.260 M NH4NO3 and 0.102 M HCN
In a gas mixture, the partial pressures are nitrogen 420 torr , oxygen 125 torr , and helium 245 torr. What is the total pressure (torr) exerted by the gas mixture?
Draw Fischer projection formulas for the products likely to be obtained from the bromination of (Z)-2-pentene with Br2/acetic acid. Identify the chiral centers with asterisks and label each center as R or S.
you are testing some novel fuel mixtures for potential use in automobiles. your testing apparatus is a 2.54-cm inner
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