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How many milliliters of 3.4 M NH4Cl must be added to 250 mL of 0.23 M NH3 to obtain a buffer solution having pH=9.40?
using a gas sample of 757 ml is compressed at stp to a volume of 118 ml and the temperature raised to 39 degrees c.
How many grams of magnesium metal will react completely with 4.8 liters of 5.0 M HCl?
Barium peroxide decomposes when heated to give BaO and O2. Write the balanced equation for this reaction. How many moles of O2 is formed when 0.500 mole of BaO2 is decomposed
The reaction, seen below, is carried out in a constant-volume flask. Initially only dimethyl ether is present and the pressure is 0.350 atm. What is the pressure of the system after 8.0 minutes? Assume ideal behavior.
A beaker with 175ml of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100M .
Which of the following pairs might be expected to be more ionic? (a) CaCl2 or MgCl2 (b)NaCl or CaCl2 (c) NaCl or CuCl (d) TiCl3 or TiCl4
Nuclides above the valley of stability can become more stable through which of the following processes
Write the Lewis-dot structure for the following species. If resonance occurs, draw all resonance forms. Give the formal charge and oxidation number of each atom in each species.
what is the molar mass of the protein? A solution of 7.50 mg of a small protein in 5.00 ml of aqueous solution has an osmotic pressure of 6.80 torr at 23.1 degrees celcius.
List the similarities and differences between the classical - and - quantum-mechanical equations of motion. How does the latter account for the quantization of energy and wave-particle duality
consider the decomposition of the compound c5h6o3 as given. c5h6o3 g rarr c2h6 g 3 co g and determine k for this
Using the calibration data provided below, calculate the concentration of cocaine (mg/mL) in the original urine sample.
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