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1) A sample of helium gas initially at 10.2°C, 601 torr and 1.14 L was heated to 92.8°C while the volume expanded to 4.94 L. What is the final pressure in atm?
2) How much water, in mL, would need to be evaporated to 0.271 M solution of HCl if you began with 169 mL of a 0.910 M HCl solution?
3) Identify the substance being oxidized in the following reaction: CH4 + O2 --> CO2 + 2H2O.
4) First-generation automobile airbags were inflated by the decomposition of sodium azide:
2 NaN3 (s) → 2 Na(s) + 3 N2(g)
What mass of sodium azide would be required to inflate a 5.7 L airbag to a pressure of 1.26 atm at 17??
5) For each of the following acids, write the formula of the conjugate base.
a) HCO3-
b) CH3NH3+
c) HNO2
Suppose that ammonia decomposes at 600 Kelvin to establish equilibrium NH3 1/2N2(g)+3/2H2 for which K=0.395. You have a box volume of 1.00 liter into which you inject 2.65 grams of NH3 at 600K. What will be the final concentrations of NH3,N2, and..
Consider the titration of 30 mL of .025 M NH3 with .025 M HCl. Calculate the pH after the following volumes of titrant have been added.
Are the color changes that accompany heating as well as cooling of the equilibrium mixture in agreement with Le Chatelier's principle. Explain
What is the concentration of chloride ions in a solution that contains 15.6 mM sodium chloride, 21.4 mM calcium chloride, and 9.23 mM lithium sulfate?
If the reaction of 2.50 g of aluminum with 2.50 g of oxygen produced 3.50 g of aluminum oxide, What is the % yield of the reaction?
What is the correct balanced net ionic equation which represents the metathesis reaction between sodium sulfide and aluminum chloride
Compute the equilibrium concentrations of each ion in the final solution resulting from the mixing of 40.00mL of 0.0450 M MgI2 and 60.00mL of
What mass of ethylene glycol (antifreeze, MW = 62.1 g/mol) must be added to 10.0 liters of water to produce a solution that freezes at -23.3 ºC? The density of water is 1.00 g/mL and Kf = 1.86 ºC/m.
The blue color of the sky results from the scattering of sunlight by molecules in the air. The blue light has a frequency of about 7.5x10^14 Hz, what is the wavelength in nm associated with this radiation
Utilize ionization energy and electron affinity values to compute the energy change (in kj/mol) for the subsequent reaction for the following reaction
questionconsider the reaction 2nobrg --gtbr2g 2no ga sample of pure nobr at a concentration of 0.200 m is allowed to
If a 10.5 mL sample of vinegar was titrated to the stoichiometric equivalence point with 10.25 mL of 1.5 M NaOH, what is the mass percent of acetic acid.
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