Answer:
The assumption is quite reasonable.........
A lightbulb contains Ar gas at a temperature of 295K and at a pressure of 75kPa. The light bulb is switched on, and after 30 minutes its temperature is 418 K. What is a numerical setup for calculating the pressure of the gas inside the light bulb at 418K?
Explanation:
P
1
T
1
=
P
2
T
2
given constant
n
, and constant
V
, conditions that certainly obtain with a fixed volume light bulb.
And so
P
2
=
P
1
T
1
×
T
2
=
75
⋅
k
P
a
295
⋅
K
×
418
⋅
K
≅
100
⋅
k
P
a
.
Had the light bulb been sealed at normal pressure during its manufacture, what do you think might occur when it is operated?
Answer:
Attractive force is predominant between the two atoms
- The two hydrogen atoms approach each other to form a bond
- The two hydrogen atoms start to combine to form a hydrogen molecule
Repulsive force is predominant between the two atoms
- The potential energy of the system is positive
- The internuclear distance between the two hydrogen atoms is less than the bond length
Attractive and repulsive forces balance each other
- The two hydrogen atoms form a stable hydrogen molecule
- The potential energy of the system is at minimum
There is no interaction between the two atoms
- The hydrogen atoms are very far apart
Explanations:
- <em>increase in potential energy causes repulsion</em> between the atoms, whereas<em> decrease in potential energy causes attraction</em> between the atoms
- in order for the bonding to occur, the attractive forces must be greater than the repulsion forces.
- The potential energy is positive when the repulsion forces is greater. This is because the distance between the two atoms is smaller than the bond length
- The potential energy of the system is at its minimum because the attractive and repulsive forces balance out each other.
Answer: Glucose and oxygen
Explanation:
The basic products of photosynthesis are glucose and oxygen. Photosynthesis is a process in which green plants produce there own food from carbon dioxide (CO2) and water (H2O) and in the presence of energy from the sun to produce glucose(food) and oxygen
After series of reaction, the overall equation for photosynthesis is
6CO2 + 6H20 + (sunlight ) → C6H12O6 + 6O2
Carbon dioxide + water + energy from sunlight to produces glucose and oxygen.
Answer is glucose and oxygen
Hydrogen mass is 1, the atom with mass number 7 is Lithium
