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A .499 mol sample of graphite was heated with 2.16 mol oxygen gas to form carbon dioxide. Graphite is the limiting reagent in this reaction. Calculate the total moles of gas present after the reaction?
A 14.0 g sample of X combines with a 26.2 g sample of Y to form the compound XY2. What is the mass of the reactants.
Concentration Units Conversions, Lethal concentration (50 percent kill): 2,485 mg/m3/4 hour... this is for a rat
When 9 mL of a solution containing 2.5 M AlBr3 is diluted to 30 mL, a dilute solution is formed. What is the Br- concentration in 15 mL of the dilute solution?
total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 149 g of solution. The reaction
Calculate the molecular rms speeds of He atoms at 10, 100, 1000 K in units of meters per second and miles per hour.
Using Le Chatelier's Principle to predict the effect of a change in conditions on a chemical equilibrium - Predict how the equilibrium of the following reactions will be affected by the changes listed.
When 0.100g of graphite is burned completely in a bomb calorimeter(heat capacity =3.344kJ/?C), containing 3000 g of water, a temperature rise of 0.21?C is observed.
For each line in the hydrogen spectrum, how do you deduce n2 (the upper state) and n1 (lower state) and if you could record the absorption spectrum of hydrogen gas, what would it look like?
The mass of an electron is 9.11 times 10^{-31}kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31times 10^{-10} how fast is the electron moving relative to the speed of light? The speed of light is 3.0 times10^8 m/s.
Electrophilic addition reaction of conjugated dienes that occur at high temperatures and/or long reaction times (reversible conditions) are said to be under
A patient needs 2.70×10^-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
.134 mol of KCl and .230 mole of CaCl2 were dissolved in water. Calculate the total of number of moles of Cl- of ions in the solution ?
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