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A mixture of methane and carbon dioxide gases, at a total pressure of 648 mm Hg, contains 2.03 grams of methane and 6.40 grams of carbon dioxide. What is the partial pressure of each gas in the mixture? PCH4 =
PCO2 =
how many grams of sodium are needed to produce 19.4 L of hydrogen gas according to the following reaction at 25 °C and 1 atm? Sodium (s) + water (l) > sodium hydroxide (aq) + hydrogen (g)
A gaseous hydrocarbon, in a volume of 23.4 L at 392 K and a pressure of 3.16 atm, reacts in an excess of oxygen to give 165.7 g of H2O and 404.7 g of CO2. Determine the molecular formula of the hydrocarbon
A 15.8 g mixture of H2S and C2H6 gases is burned in enough oxygen. After drying the products the mole fraction of SO2 in the mixture is found to be 0.25. What volume of 0.1M KMnO4 solution is necessary to react with the SO2 in the burning products?
SO2 + KMnO4 +H2O - - - > MnSO4 + K2SO4 +H2SO4
The boiling points of the hydrides of halogens are given below.
Compound HF HCl HBr HI
Boiling point (℃) 293 188 206 238
Discuss the variation in these boiling points in terms of intermolecular forces of attraction.
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Identify the polarity of HF, HCl, HBr, HI
5. What is the mass percent sucrose in a solution made by combining 365 g of a 8.90 percent sucrose by mass aqueous solution with 145 g of an 6.80 percent sucrose by mass aqueous solution? (5 points)
4. Glucose is a natural sugar that occurs in abundance. What is the mass percent of a solution formed from 148 g of glucose and 698 g of water? (5 points)
To neutralize 15.8 mL of 0.687 molarity sodium hydroxide, how much 0.376 molarity HCl is needed? (5 points)
____HCl(aq)+____NaOH(aq)→____NaCl(aq)+____H(OH)(l)
To precipitate all the sulfate ions from 22.0 mL of 0.150 molarity aluminum sulfate as barium sulfate, how many mL of 0.250 molarity3. barium nitrate are required? (8 points)
____Ba(NO3)2(aq)+____Al2(SO4)3(aq)→______BaSO4(s)+____Al(NO3)3(aq)
When 200 mL of 0.700 molarity silver nitrate is introduced to 150 mL of 0.500 molarity potassium chromate, how many grams of silver chromate will precipitate? (12 points)
____ AgNO3(aq) + ____K2CrO4(aq) → ____Ag2CrO4(s)+ ____KNO3(aq)
