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50.0 mL of a 1.40 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 165 mL of water. What is the final concentration? Assume the volumes are additive.
2 NaClO3-> 2 NaCl + 3 O2 Determine the number of moles of O2 produced by the decomposition of 213 g of NaClO3.
What is the specific heat of a substance that it takes 192 Joules to raise the temperature of 45 grams by 6 degrees Celsius
Consider the equation A(aq) + 2B(aq) -> 3C(aq) + 2D(aq). In one experiment, 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K.
A 15.0 gram sample of chromic acid is dissolved in enough water to produce 275 mL of solution. The concentration of the solution is ?
Considering which elements are being oxidized and reduced, determine how many moles of electrons are transferred between the elements being oxidized and reduced
The compound has a molecular mass of 70. D) The compound contains a cyano or alkyne group. E) The compound contains a CO group
How much heat (in kJ) is evolved in converting 1.00mol of steam at 130.0C to ice at -50.0C? The heat capacity of steam is 2.01 and of ice is 2.09 .
Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 300 mg HCN per kilogram of air when inhaled.
Calculate Kb for methylamine. Is methylamine strong base or weaker base than ammonia?
How many grams of O2 gas would occupy a 400.0 liter container when the temperature is 300.0 K and the pressure is 2.20 atm?
A stock solution is prepared by adding 24 mL of 0.4 M Na3PO4 to enough water to make 79 mL. What is the PO43- concentration of 25 mL of the stock solution?
When NH3 is prepared from 28 g N2 and excess H2 the theoretical yield of NH3 is 34 g. When this reaction is carried out in a given experiment, only 30. g is produced.
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