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In a famous experiment, Matthew Meselson and Franklin Stahl grew E. coli cells in a medium containing only the "heavy" isotope of nitrogen, 15N. These cells were then transferred to a medium with the "light" isotope of nitrogen, 14N. The results of the experiment supported the hypothesis of semiconservative replication, which was proposed by Watson and Crick.
a student titrates 50.0ml of apple juice and reports the following in the titration to the phenolphthalein end point with 0.1011 M NaOH.
Find the volume of FeSO4 solution - What volume of 0.200M FeSO 4 solution would be required to react with 20.0mL of 0.250M KMnO 4 according to the following equation?
If Qp = 1.2 1020 and PO2 = 0.318 and PN2 0.812, what is the partial pressure of NO?
dissolved .31 grams of KHP in 25 ml of water and it required 15.5ml of NaOH to reach end of titration, how many moles of KHP were originally present before the addition of the NaOH?
determine the expression for the rate of the reation in terms of the change in concetration of each of the reatants and products.
if the density of mercury is 13.6g/cm3, what will be the volume of 300g of mercury ?
Calculate the molarity of each of the following solutions 20.0 g NaCl in 1.0 L H2O
You add 15.0 of iron to 25.5 of water and observe that the volume of iron and water together is 27.4 . Calculate density of iron.
50.0 mL of 2.00 M H2SO4 react with 75.0 mL of 2.00M NaOH. Identify the limiting and excess reactants. How many grams of Na2SO4 will be formed.
How many atoms of neon occupy a volume of 14.3 L at STP.
A gas-filled balloon having a volume of 2.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth)
The titration of 0.7910 grams of an unknown weak acid requires 41.5 mL of 0.139 M NaOH in order to reach the equivalence point.
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