Answer: The option that represents the chemical properties of Hydrogen gas is A (It explodes with a flame.)
Explanation: Hydrogen gas is the lightest of all gases and the most abundant element in the universe. It's physical and chemical properties are the characteristics that distinguishes it from any other substance.
chemical properties of Hydrogen are the characteristics that determine how it will react with other substances or change from one substance to another. They include:
-It burns in air or oxygen to produce water.
-When mixed with air it can spontaneously explode by spark, flame or sunlight. I hope this helps. thanks.
Answer:
Because boys are overrated
Explanation:
So that you can learn while being safe. Wearing goggles, for eye protection when dealing with chemicals
Answer: Option (B) is the correct answer.
Explanation:
Expression for the given decomposition reaction is as follows.
Let us assume that x concentration of 
is present at the initial stage. Therefore, according to the ICE table,
Initial : x 0
Change : - 0.1 
Equilibrium : (x - 0.1) 0.2
Now, expression for 
of this reaction is as follows.
Putting the given values into the above formula as follows.
x = 0.12
This means that 
= x = 0.12 atm.
Thus, we can conclude that the initial pressure in the container prior to decomposition is 0.12 atm.
