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Savatey [412]
2 years ago
12

A 500 mL sample of a gas at 507 torr and 97 Degrees Celcius has a mass of 0.966g. What is the gas?

Chemistry
1 answer:
Deffense [45]2 years ago
8 0
 the  gas  is identified  as follows

by  use  of  ideal  gas  equation  that is PV = nRT  where n  is  number  of  moles  calculate  the number of moles  involved

P=  507  torr
R(gass constant) = 62.364 L.torr/K.mol
T= 97 + 273 = 370 k
V  = 500ml = 500/1000= 0.5 Liters

by making n the  subject  of the  formula  n = PV/RT
= (507 torr x0.5 L)/ 62.364 L.torr/Mol.k   x  370  k) =  0.011  moles

the  molar  mass  of the  gas = mass/  number  of moles

= 0.966/0.011= 88 g/mol  =  the  gas is therefore  Krypton  since  88 g/mol is one of the isotope of  krypton
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On a clear day at sea level, with a temperature of 25 °C, the partial pressure of N2 in air is 0.78 atm and the concentration of
joja [24]

Answer : The partial pressure of nitrogen gas is, 2.94 atm

Explanation:

According top the Henry's Law, the concentration of a gas in a liquid is directly proportional to the partial pressure of the gas.

C\propto P

C=K_H\times P

K_H is Henry's constant.

or,

\frac{C_1}{C_2}=\frac{P_1}{P_2}

where,

C_1 = initial concentration of gas = 5.3\times 10^{-4}M

C_2 = final concentration of gas = 2.0\times 10^{-3}M

P_1 = initial partial pressure of gas = 0.78 atm

P_2 = final partial pressure of gas = ?

Now put all the given values in the above formula, we get the final partial pressure of the gas.

\frac{5.3\times 10^{-4}M}{2.0\times 10^{-3}M}=\frac{0.78atm}{P_2}

P_2=2.94atm

Therefore, the partial pressure of nitrogen gas is, 2.94 atm

5 0
2 years ago
Combustion of gasoline in automobiles produces poisonous gases. Catalytic converters that contain solid platinum, palladium, and
bagirrra123 [75]
It provides an alternative pathway for the rxn.
5 0
2 years ago
Glade air freshener gel “disappearing” is an example of
netineya [11]

Answer:

Vaporization

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Substances with high vapour pressure tend to be easily converted to vapour phase. Hence if Glade air freshener gel 'disappears' easily, then it has a high vapour pressure and is easily converted to vapour (gas).

8 0
2 years ago
Sakura tested the ph of several solutions. which substances are acidic? check all that apply. cola-flavored soda: 2.6 cranberry
Step2247 [10]

Answer:- Cola-flavored soda:2.6, cranberry juice:2.9 and pickle juice:5.5 are acidic.

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There are only three solutions with pH value below 7 and so they are acidic. these three solutions are, cola-flavored soda, cranberry juice and pickle juice.

Rest of them are basic as their pH value is greater than 7.

5 0
2 years ago
Read 2 more answers
Cu + 2AgNO3 es002-1.jpg 2Ag + Cu(NO3)2 How many moles of copper must react to form 0.854 mol Ag?
marin [14]
Balance Chemical Equation is as follow,

<span>                        Cu + 2 AgNO</span>₃     →    2 Ag + Cu(NO₃)₂

According to Balance Equation,

                   2 Moles of Ag is produced by reacting  =  1 Mole of Cu
So, 
     0.854 Moles of Ag will be produced by reacting  =  X Moles of Cu

Solving for X,
                             X  =  (0.854 mol × 1 mol) ÷ 2 mol

                             X  =  0.427 Moles of Cu
Result:
            0.854 Moles of Ag 
are produced by reacting 0.427 Moles of Cu.
4 0
2 years ago
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