Answer:
all pure substance are molecules
Answer:
Electrochemical cells convert chemical energy into electrical energy or vice versa. Electrolytic cell is a type of electrochemical cell in which electrical energy is converted into chemical energy. ... Electrolytic cells consist of positively charged anode and a negatively charged cathode.
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Answer:
The chemical formula of the gas is
.
Explanation:
The difference between the container with gas and empty container is equal to the mass of the gas.
Let the gas be 
Mass of the gas = m
Molar mass of diatomic gas = M
Pressure of the gas = P = 1.80 atm
Volume of the gas = V = 4.6 L
Temperature of the gas= T = 27.0 C = 27.0 + 273 K = 300 K
Moles of diatomic gas = n = 
Using ideal gas equation:



Atomic mass of the element X = 
The element is nitrogen and the diatomic gas is
.
Explanation:
Any quantity which can be measured is called a physical quantity.
I’m pretty sure it is A at least that’s what we did at our school to test this