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a 155ml volume of oxygen gas is collected over water at 23 degrees celsius and a barometric pressure of 770mm. the gas weighs 0.185 grams. what is the pressure of the dry gas?
Methyl alcohol (CH3OH) is made by reacting carbon monoxide with H2. Starting with 2.5 g of H2 and 30 L of CO, what mass of methyl alcohol could be produced at STP? which is the limiting reactant?
What is the mass of aluminum metal that reacts to give 1 g of hydrogen gas?
The vapor pressure of bromine, Br2(l) at 25°C is 228 mm Hg.If 2.00 g of liquid bromine is used, what is the final pressure in a 2.0 L flask?
Calculate the number of moles of KHP? b. How many moles of NaOH will react with the KHP dissolved in water? c. Calculate the Molarity of the NaOH solution?
What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of 308 torr at 25 oC? (At 25 oC the vapour pressure of pure pentane is 511 torr and that of hexane is 150 torr.)
Find the molarity of a Ca(OH)2 solution,given that 363 mL of it is neutralized in a titration by 187 mL of 0.0058 M HNO3.
A beaker with 130 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M.
Arrange the molecules in order of decreasing boiling point Molecules are methane, dimethyl ether
When CuCN is used in the Sandmeyer reaction, the preparation is generally carried out in a neutral medium. Can you offer an explanation of why this is done?
calculate the molality of a solution prepared by dissolving 19.9 grams of KCl in 750.0 mL of water
HEPES are synthetic amine compounds that are often used to make buffers for biochemical studies. What is the pH of a 1.0 L buffer solution that is 0.250M HEPES
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 16.0 L of H2 gas if the pressure of H2 is 729 torr at 21.0°C?
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