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A flammable gas made up only of carbon and hydrogen is found to effuse through a small hole in 1.50 min. Under the same conditions of temperature and pressure it takes an equal volume of bromine vapor 4.74 min to effuse through the same hole. Calculate the molar mass of the unkown gas and suggest what this gas might be.
A 2.0 mole sample of the compound K2[Pt(CN)4] is dissolved in water. How many total moles of ions will the solution contain?
Find out the ( Number of waters of hydration -Molecularweight -Mass of water in one mole -Mass NOT water in mole-Mass percent water )
a 3.0 l sample of sih4 gas at 356 mm hg pressure and 25degc is allowed to react with o2 gas. what volume of o2 gas in
When electrical current of unknown magnitude is run through the device for 3.50 min, 16.1 mL of water-saturated H_2(g) is collected. The temperature and pressure of the system are 25 degreesCelsius and 715 torr.
How is the mass in amu of one atom of an element related to the mass in grams of one mole of the element?
Radioactive nitrogen-13 has a half-life of 10 minutes. After 40 minutes, how much of this isotope would remain in a sample that originally contained 96 mg?
Dinitrogen oxide ( nitrous oxide, or laughing gas ) is sometimes used as an anesthetic. Here are some data about the N2O molecule: N-N bond length = 113 pm; N-O bond length = 119 pm.
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?
If 200 ml of gas at 400 torr is transferred to a 20.0 ml cotnainer. What will the new pressure be if the temperature is kept constant?
How many kJ of energy are released when 10.0 g Al reacts with Fe2O3 as shown in the following equation
can the solubilities of formate pbcho22 pkso 6.70 pka 3.75 and copper iodate cuio32 pkso 7.13 pka 0.79 be made
Determine the boiling point of the solution If 11.9 grams of a nonelectrolyte with molar mass = 30.5 g/mol are combined with 200.0 grams of the solvent,?
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