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how many kilogram of methane gas must bedischarged in a room of 306 cubic meters to reach the lower explosive limit of
Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate this pH
For a first-order reaction, what fraction of starting material will remain after 5 half-lives
What volume of O2 at 684 mmHg and 21 degree celsius is required to synthesize 25.0 mole of NO?
How much heat is evolved when 233 g of ammonia gas condenses to a liquid at its boiling point?
draw the valid lewis structures of polyatomic ions in bro4-. determine the number of resonance forms for each structure
Originally, a system contains only HI at a pressure of 1.00 atm at 520 degrees celsius. The equilibrium partial pressure of H2 is found to be 0.10 atm. Calculate Kp. 2HI(g) H2(g)+I2(g).
In the Lewis structure of HOCH2CH2OH, how many valence electrons need to be shown and how many pairs of electrons are bonding and how many are non-bonding
Vitamin D3 Vitamins are chemicals required by humans in small amounts and are not made within our bodies. Such chemicals must therefore be acquired from ones diet.
Solid lithium hydroxide is used in space vehicles to remove the carbon dioxide gas exhaled by astronauts. The hydroxide reacts with the carbon dioxide to form solid lithium carbonate and liquid water.
How would a student make 500.0 mL of a 0.07000 M solution of iron (III) using a stock solution that is 0.2550 M in iron (III)? Explain how this would be done.
The human body obtains 955 of energy from a candy bar. If this energy were used to vaporize water at 100.0 , how much water (in liters) could be vaporized? (Assume the density of water is 1.00.)
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