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A 3.592 g sample of hydrated magnesium bromide, MgBr2.xH2O is dried in an oven. When the anhydrous salt is removed from the oven, its mass is 2.263 g. What is the value of x?
a bacterial culture isolated from sewage produced 35.5 ml of methane ch4 at 31 oc and 753 mmhg. what is the volume of
Which of the following correctly shows intrachain hydrogen bonding (???) in an alpha-helix? A. -NH HN- B. -C=O HC- C. -C=O HN- D. -C=O O=C- E. -CH HC-
the equilibrium constant kp for the decomposition of nitrogen dioxide is 4.48 10-13 at 250c. what is the kc for that
What does the structure of isopinocampheol (the product of a hydroboration-oxidation reaction of (1R)-(+)-alpha-Pinene) indicate about the mechanism of the reaction in terms of regioselectivity and stereoselectivity
A balloon filled with helium gas has a volume of 500 mL at a pressure of 1 atm. The balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm.
Calculating percent purity from a reaction, One of the reactions that occurs in a blast furnace, where iron ore is converted to cast iron is Fe2O3 + CO = Fe + CO2.
Calculate the spring constant of this silicone band including units. I know Hooke's law is F=-KX, where F is force, -K is the consent of the spring which I need to find and X is the displacement from relaxed position, but i'm giving the oscillatio..
You have samples of approximately 8mL solution with ph ranging from 4 to 10. Calculate the volume of 1M HCIO4 needed to lower the ph to 2.5.
a 368-g sample of water absorbs infrared radiation at 1.06x104nm from a carbon dioxide laser. suppose all the absorbed
Calculate the mass of sugar and salt in the original mixture. The other answer posted to the other time this questionw as posted seems to be incorrect.
When a 4.25g sample of solid ammonium nitrate dissolves in 60.00g of water in another insulating calorimeter the temperature drops from 21.0450C to 16.8700C. What is the (delta)H for the dissolution
A certain binary compound has the formula XO, where X denotes the other element in the binary compound. A 31.20 g sample of the compound, when subjected to string reducing conditions, leaves 23.39 g of the reduced element. Identify the element by ..
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