10. it is always moving.
Moving electrons in a conductor are an example of\
energy.

electrical

Explanation:

Moving electrons in a conductor are an example of the electrical energy. Conductors are referred to as materials that allow for the passage of electricity in them.

We should note that electrical energy has to do with the energy associated with how electrons move. Atoms are made from litlle particles such as protons, electrons, and the neutrons. When force is being applied, the electrons can move.

C ) 1.70 g/L

Explanation:

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Also,

Moles = mass (m) / Molar mass (M)

Density (d)  = Mass (m) / Volume (V)

So, the ideal gas equation can be written as:

PM=dRt

At STP,

Pressure = 1 atm

Temperature = 273.15 K

Molar mass of fluorine gas = 38 g/mol

Applying the equation as:

1 atm × 38 g/mol = d × 0.0821 L.atm/K.mol × 273.15 K

⇒d = 1.70 g/L