4 Na + O₂ = 2 Na₂<span>O
</span>
4* 23 g Na --------> 16 g O₂
9.5 g Na ------------> ?
Mass of O₂ = 9.5 * 16 / 4 * 23
Mass = 152 / 92
Mass = 1.6521 g of O₂
Molar mass O₂ = 16.0 g/mol
1 mole O₂ ------------ 16.0 g
? mole O₂ ------------ 1.6521 g
mole O₂ = 1.6521 * 1 / 16.0
≈ 0.10325 moles of O₂
hope that helped!
Answer: A little bit confused can you explain what I have to do
Explanation:
Answer:
True.
Explanation:
- As the concentration of [H⁺] of (1.0 x 10⁻⁴ M) is higher than that of (1.0 x 10⁻⁹ M), so the solution with [H⁺] of (1.0 x 10⁻⁴ M) is highly acidic.
- From the calculation point of view:
We can calculate the pH of the solution using the relation: pH = - log[H⁺].
pH is a logarithmic scale used to specify the acidity or basicity of an aqueous solution.
pH (0-7) is the acidic region and (7-14) is the basic region.
As the value of pH is lower means highly acidic solutions.
- <em>The pH of [H⁺] of (1.0 x 10⁻⁴):</em>
pH = - log[H⁺] = - log(1.0 x 10⁻⁴) = 4.0.
- <em>The pH of [H⁺] of (1.0 x 10⁻⁹):</em>
If we calculate pH directly, we will found that the pH of this acid is 9 and this is not accepted.
<em>Actually, it is very diluted acid that has a pH of 7.0 because there is another source of [H⁺] from water that has a concentration of (1.0 x 10⁻⁷).</em>
So, the concentration of [H⁺] is (1.01 x 10⁻⁷).
∴ pH = - log[H⁺] = - log(1.01 x 10⁻⁷) = 6.995.
It is clear that A solution with a hydrogen ion concentration [H+] of 1.0 x 10⁻⁴ M is more acidic than a solution with a [H+] of 1.0 x 10⁻⁹ M.
<em>So, this statement is true.</em>
Apart from their habits , bacteria and archea differ in cell wall structure and membrane lipid composition . A ll bacteria have peptidoglycans in the cells wall where as the archea do not . both also are different in the RNA polymerases and thus in their protein synthesis .I hope that can help you !!:))
The answer would be an unpredictable rate