The given question is incomplete the options of the compete are:
A. On racecar tracks
B. In real-world conditions
C. In flooded environments
D. On closed courses
Answer: In real world conditions.
Explanation:
Fuel cell vehicles use hydrogen has as a fuel in order to run the car. Unlike the other conventional vehicle that run on fossil fuels and gasoline.
The hydrogen and oxygen combines together in order to power the the motor in the car. The electricity produced by the combination of this runs the car and the waste product is water.
They are also called as electronic cars but the main problem is that it has not been yet tested in the real world. There are many more physiological conditions that differ from place to place in the real world conditions.
Firstly, the cars needs to be tested in the real world and see where there are any advantages and disadvantages over conventional vehicles.
Hence, it is not available to the general public for purchase.
There are 6.02214*10^23 molecules , I'm not so sure about it though.
The number of moles of a gas if it occupy a volume of 4dm at 10 atm and - 200 c is 6.67 moles
calculation
by use of ideal gas equation
that is PV =nRT
where P(pressure) = 10 atm
V( volume) = 4dm^3 = 4L
n(number of moles) =?
R(gas constant) = 0.0821 L.atm/mol.K
T = -200 +273 = 73 K
make n the formula of the subject n = PV/RT
n is therefore = (10 atm x 4l)/(0.0821 L.atm/mol.K x 73 K) = 6.67 moles
Answer:
The substance can be best classified as a molecular substance
Explanation:
The given information are;
The physical state of the substance at 25°C = Solid state
The physical state of the substance at 150°C = Molten
Molecular substances are those with bonds formed by electron sharing among the constituent atoms and they contain a few number of atoms per molecule. Molecular compounds with molecular weight less than 100, usually exist as liquids or gases at room temperature, while those with molecular weights over 100 can be found in a solid state at room temperature.
Generally, molecular compounds are usually volatile and have a melting point less than 300°C
Therefore, the substance can be best classified as a molecular substance.
