Answer:
Final number of moles = 0.675 mol
Mass = 2.7 g
Explanation:
Given data:
Initial volume of gas = 2.00 L
Final volume of gas = 2.70 L
Initial number of moles = 0.500 mol
Final number of moles = ?
Solution:
Formula:
V₁/n₁ = V₂/n₂
V₁ = Initial volume
n₁ = Initial number of moles
V₂ = Final volume of gas
n₂ = Final number of moles
Now we will put the values in formula.
2.00 L /0.500 mol = 2.70 L / n₂
n₂ = 2.70 L× 0.500 mol /2.00 L
n₂ = 1.35 L.mol / 2.00 L
n₂ = 0.675 mol
B)
Grams of helium added = ?
Solution:
Mass = number of moles × molar mass
Mass = 0.675 mol× 4 g/mol
Mass = 2.7 g
of water.
2 mL
200 mL
2L
200 L
The statement, that describes the energy being used around your class room is "mechanical energy, heat energy, light energy and sound energy."
Energy is defined by scientists as the ability to perform tasks. Energy is described as the "capacity to accomplish work, which is the ability to apply a force that causes an object to move." It can be potential, kinetic, thermal, electrical, chemical, nuclear, or other. Computers, smart boards, overhead projection machines, lighting, and fans are used in the classroom.
Electrical energy is converted into mechanical energy by an electric fan.
The transfer of charge through the filament in the tubelight heats it up and causes it to glow. The tubelight transforms electrical energy to heat energy and light energy in this manner. When you switch on your computer, electrical energy is converted into sound and light energy. When the computer is turned on, electrical energy is converted to thermal energy.
Hence the correct answer is mechanical energy, heat energy, light energy and sound energy.
Learn more about energy here
https://brainly.in/question/16686895
#SPJ2
Check all actions you would take.
Throw the broken pieces away.
Use the punctured cup as the outside cup,
not the inside cup.
0 Replace the cup
O Clean the area
| Mention the spill to the teacher.
O Call 9-1-1
Answer:Throw the broken pieces away, Replace the cup, Clean the area, Mention the spill to the teacher.
Explanation:
Answer:
1,3,4,5
Explanation:
To solve this we must be knowing each and every concept related to solution. Therefore, the term used for the given salt in water is solution.
A solution is a uniform mixing comprising two or more parts. It possesses particle-level homogeneity. People usually conceive of it as a liquid containing a solid, liquid, or gas dissolved inside it. This is not totally correct.
The component of such a solution that absorbs the other component is referred to as the solvent. The majority of the solution is made up of a solvent. A sugar solution in water, for example, is solid inside the liquid. Sugar is indeed the solute in this case, while water is indeed the solvent. The term used for the given salt in water is solution.
Therefore, the term used for the given salt in water is solution.
To know more about solution, here:
#SPJ2