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3. A gaseous misture of only argon and krypton consists of 28% Ar by mass. if the mixture exerts a total pressure of 3.50 atm, what is the partial pressure of krypton?

2 Ga(s) +6 HBR(aq) ---> 2 GaBr3(aq) + 3 H2(g)

1. A 725 mL Sample of Argon is at 75.1 Degree C is 18.65 mmHg 2 Ga(s) +6 HBR(aq) ---> 2 GaBr3(aq) + 3 H2(g) Degree C. What is the mass percent of gallium in the alloy? (gallium reacts but copper does not) The pressure of the water vapour at 21 Degree C, how many grams of gas must be vented from the container to keep the pressure of the gas constant? 3. A gaseous misture of only argon and krypton consists of 28% Ar by mass. if the mixture exerts a total pressure of 3.50 atm, what is the partial pressure of krypton? 4. a 9.98g sample of a gallium-copper alloy reacts with excess hydrobromic acid. the 3.45L of H2 produced is collected over water at a barometric pressure of 751.8 mmHG and 21 Degree C. If the container were heated to 172 Degree C while holding pressure constant? 2. A 14.1g sample of a certain gas was introduced into a constant volume container at 22C. What will be the new volume of the gas if the temperature is changed to 31.5 Degree

Explanation / Answer

1) V1/T1 = V2/ T2

725mL /348.1 = V2 /304.5

V2 = 634.1 mL

2) mass1/mass2 = T2/T1

14.1g/mass 2 = 295/445

mass 2 =21.2g

3) partil pressure = molefraction * total pressure

partial pressure = 28/100*(3.50 ) = 0.98atm

4)

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