Answer: The ratio of the number of oxygen molecules to the number of nitrogen molecules in these flasks is 1: 1
Explanation:
According to avogadro's law, equal volumes of all gases at same temperature and pressure have equal number of moles.
According to avogadro's law, 1 mole of every substance contains avogadro's number of particles.
Thus as oxygen and nitrogen are at same temperature and pressure and are in equal volume flasks , they have same number of moles and thus have same number of molecules.
The ratio of the number of oxygen molecules to the number of nitrogen molecules in these flasks is 1: 1
Answer:
Number of moles nitric acid in the cylinder is 400.539g/mol.
Explanation:
From the given,
Weight of empty gas cylinder = 30.01 g/mol
Number of moles nitric acid = =?
The mass of nitric acid in the cylinder =
Number of moles of nitric acid =
Therefore, number of moles nitric acid in the cylinder is 400.539g/mol.
Answer:
here ya go trust
Explanation:
Answer:
Explanation:
Given , molarity of glycerol=
Volume= 1 L.
Therefore, No of moles of glycerol=
Now, volume of water needed, V=998.8 mL.
Density is given as= 0.9982 g/mL.
Therefore, mass of water =
Now, molality=
Hence, this is the required solution.
Answer : The vapor pressure (in atm) of a solution is, 0.679 atm
Explanation : Given,
Mass of = 1.00 kg = 1000 g
Moles of = 3.68 mole
Molar mass of = 18 g/mole
Vapor pressure of water = 0.692 atm
First we have to calculate the moles of .
Now we have to calculate the mole fraction of
Now we have to partial pressure of solution.
According to the Raoult's law,
where,
= vapor pressure of solution
= vapor pressure of water = 0.692 atm
= mole fraction of water = 0.938
Therefore, the vapor pressure (in atm) of a solution is, 0.679 atm
Answer:
Kinetic energy of boy just before hitting the ground is 1000 J.
Speed of boy just before hitting the ground is 7.67 m/s
or 17.16 mi/hr.
Explanation:
Given that:
Mass of boy = 75lb = 34 kg
Height, h = 10ft = 3m
To find:
Kinetic energy of boy when he hits the ground.
<em>As per law of conservation of energy The potential energy gets converted to kinetic energy.</em>
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<em></em><em> </em>Kinetic energy at the time boy hits the ground = Initial potential energy of the boy when he was at the Height 'h'
The formula for potential energy is given as:
Where m is the mass
g is the acceleration due to gravity, g = 9.8
h is the height of object
Putting all the values:
PE =
Hence, Kinetic energy is 1000 J.
Formula for Kinetic energy is:
where m is the mass and
v is the speed
Putting the values and finding v:
Given that:
1 m = 1.094 yd and 1 mi = 1760 yd
Converting 7.67 m/s to miles/hour: