How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?
Answers
Given:
2.5 mol O2
Required:
Grams of water
Solution:
2H2 + O2 -> 2H2O
Moles of H2O = (2.5 mol O2)(2moles H2O/1 mole O2) = 5 moles H2O
Molar mass of H2O = 18.02 g/mol
Mass of H2O = (5 moles H2O)( 18.02g/mol)
Mass of H2O =90.1g H2O
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Answer : The new pressure of the gas will be, 468.66 atm
Explanation :
Boyle's Law : This law states that pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
(At constant temperature and number of moles)
or,
where,
= initial pressure of the gas = 74 atm
= final pressure of the gas = ?
= initial volume of the gas = 190 ml
= final volume of the gas = 30 ml
Now we put all the given values in the above formula, we get the final or new pressure of the gas.
Therefore, the new pressure of the gas will be, 468.66 atm
Answer: The new pressure of the gas is 467 atm.
Explanation:
To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is inversely proportional to the volume of the gas at constant temperature.
The equation given by this law is:
where,
are initial pressure and volume.
are final pressure and volume.
We are given:
Putting values in above equation, we get:
Hence, the new pressure of the gas is 467 atm.
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The edge length of a a unit cell of calcium crystal is 509.12 pm.
Structure of the Calcium crystals
Calcium crystal has a face center cubic (FCC) structure.
Edge length of the unit cell
The edge length of the unit cell for face center cubic (FCC) structure is given in the following formula;
a = 2r√2
where;
- a is edge length
- r is the radius
a = 2 x 180 x √2
a = 509.12 pm
Thus, the edge length of a a unit cell of calcium crystal is 509.12 pm.
Learn more about edge length here: brainly.com/question/11796119
relation between edge length (a) and radius (r) is
a = 2√2 r
Given: r = 180 pm
Therefore, a = 2√2 180
= 2 x 1.141 x 180
= 410.76 pm
The length of the edge of the Ca unit cell is 410.76 pm.
b. They have similar physical qualities.
c. They have identical numbers of electrons in the outermost level.
d. They were discovered in the same location.
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Explanation:Most vertical columns share similiar chemical properties because they have identical numbers of electrons in the outermost level.
Hope this helped:)
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