Because without the mass, you can't find the molar mass and other formulas in Chemistry.
Answer: Na+ And F- & CI- and K+
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Answer:</u></h2>
(These are not rounded to the correct decimal)
130.94 atm
13,266.6 kPa
99,571.4 mmHg
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Explanation:</u></h2>
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PV = nRT
V = 245L
P = ?
R = 0.08206 (atm) , 8.314 (kPa) , 62.4 (mmHg)
T = 273.15 + 27 = 300.15K
n = 1302.5 moles
How I found (n).
5.21kg x 1000g/1kg x 1 mole/4.0g = 1302.5 moles
Now, plug all the numbers into the equation.
Pressure in atm = (1302.5)(0.08206)(300.15) / 245 = 130.94 atm (not rounded to the correct decimal)
Pressure in kPa = (1302.5)(8.314)(300.15) / 245 = 13,266.6 kPa (not rounded to the correct decimal)
Pressure in mmHg = (1302.5)(62.4)(300.15) / 245 = 99,571.4 mmHg (not rounded to the correct decimal)
The balanced equation for the above reaction is;
2H₂(g) + O₂ --> 2H₂O
Stoichiometry of H₂ to O₂ is 2:1
This means that the molar ratio in which H₂ reacts with O₂ is in the 2:1 ratio.
At constant temperature and pressure , number of moles are directly proportional to volume of gas. Therefore volume ratio in which H₂ reacts with O₂ is 2:1.
volume of 2 mL of H₂ reacts with 1 mL of O₂
therefore 250 mL of H₂ reacts with - 1/2 x 250 = 125 mL
volume of 125 mL of O₂ is required for the reaction