Answer: 40cm^3
Explanation:
Since the The air today is approximately one-fifth oxygen, the approximate volume of oxygen in 200cm3 of air would be:
= 1/5 × 200
= 40cm
The answer is 40cm^3
Answer:
S + 02= S0 - 4 e- → SIV (oxidation); 2 O0 + 4 e- → 2 O-II (reduction)
C + 02= C
Cu0 + H2SO4= CuO + H2SO4 → CuSO4 + H2O
Answer: The oxidation state of selenium in SeO3 is +6
Explanation:
SeO3 is the chemical formula for selenium trioxide.
- The oxidation state of SeO3 = 0 (since it is stable and with no charge)
- the oxidation number of oxygen (O) IN SeO3 is -2
- the oxidation state of selenium in SeO3 = Z (let unknown value be Z)
Hence, SeO3 = 0
Z + (-2 x 3) = 0
Z + (-6) = 0
Z - 6 = 0
Z = 0 + 6
Z = +6
Thus, the oxidation state of selenium in SeO3 is +6
Answer:
![H_2CO_3\rightleftharpoons H_2O + CO_2](https://tex.z-dn.net/?f=H_2CO_3%5Crightleftharpoons%20H_2O%20%2B%20CO_2)
Explanation:
When carbon dioxide dissolves and reacts with water, the water and the gaseous
reacts to form a dilute mixture solution of
(carbonic acid ).
The reaction is ![H_2O + CO_2\rightleftharpoons H_2CO_3](https://tex.z-dn.net/?f=H_2O%20%2B%20CO_2%5Crightleftharpoons%20H_2CO_3)
This is a forward reaction. And the symbol
shows that the reaction can be reversible. It means that the reaction can be carried in forward direction as well as in the backward direction.
The reaction attains chemical equilibrium until the reactants and the products no longer changes with time.
The carbonic acid can also dissociates into carbon dioxide and water in the backward direction.
![H_2CO_3\rightleftharpoons H_2O + CO_2](https://tex.z-dn.net/?f=H_2CO_3%5Crightleftharpoons%20H_2O%20%2B%20CO_2)
1 μL = 10^-6 L by definition
So...
82 μL = 82x10^-6 L = 8.2x10^-5 L