Carbon-Oxygen
We breathe in oxygen, we breathe out carbon dioxide.
Explanation:
homogeneous mixture is a type of mixture in which the composition is uniform
Answer: Chlorine gas is produced when sulfuric acid is mixed with chlorine bleach.
Explanation: This reaction is a function of the change in pH of the solution from alkaline to acidic combined with the strong oxidant properties of hypochlorous acid.
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Answer : The kinetic energy will be 24 J.
Explanation : Given,
Mass of marble = 3 kg
Velocity of a marble = 4 m/s
Formula used to calculate the kinetic energy is:

where,
K.E = kinetic energy
m = mass
v = velocity
Now putting all the given values in this formula, we get:


Therefore, the kinetic energy will be 24 J.