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A balloon contains 0.1 moles of oxygen and 0.4 moles of nitrogen. If the balloon is at standard temperature and pressure, what is the partial pressure of the nitrogen?
How do you solve for the molarity, molality, or mass percent of solute while only given two other bits of information
What is the percent dissociation of HNO2 when 0.060g of sodium nitrate is added to 105.0 mL of 0.060 M HNO2 solution? Ka for HNO2 is 4.0 x 10^-4
The solution gives an absorbance of 0.102 at 227nm using a 1.0 cm cell. A separate water sample containing benzene gives an absorbance of 0.0844 at 227nm in a 1.0 cm cell. What is the concentration of benzene in the water sample
Calculate the concentrations of all species in a 1.75 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
A solution of 62.4 g of insulin in enough water to make 1.000 L of solution has an osmotic pressure of 0.305 atm at 25°C. Based on these data, what is the molar mass of insulin?
if 76g of Cr2O3 and 27 g of al completely react to form 51 g of Al2O3 how many grams of Cr are formed?
This solution was back-titrated with a 0.0460 M Ga3+ solution until all the EDTA reacted, requiring 11.0 mL of the Ga3+ solution. What was the original concentration of the V3+ solution
what mass of magnesium in reaction with hydrochloric acid is needed to produce 128 ml of hydrogen h2 gas? the h2 gas is
Problem- what is the vapor pressure of an aqueous solution at 75 degrees Celsius containing 60 g of urea (mw= 60g/mol) in 180 g of water. The vapor pressure of water is 290 mmHg
Find the theoretical, percent yield and percent error of the reaction - Calculate the percent error of this reaction.
In elemental analysis combustion is used to analyze for C, H and N content by weight. To analyze for halogen content a variation of the following experiemnt can be used.
Methane gas (CH4) comprises 7 x 10-5 % by mass of the Earth's atmosphere. What is the residence time of the gas in the atmosphere if it is being lost to the methane sinks at the rate of 4 x 1011 kg yr-1.
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