Answer:
3.47 x 10⁻⁹.
Explanation:
- The concentration of OH⁻ = 0.16 M.
∵ [OH⁻] = √(Kb)(C).
Kb for ammonia = 1.8 x 10⁻⁵.
∴ [OH⁻] = √(Kb)(C) = √(1.8 x 10⁻⁵)(0.16 M) = 2.88 x 10⁻⁶ M.
<em>∵ [H⁺][OH⁻] = 10⁻¹⁴.</em>
∴ [H⁺] = 10⁻¹⁴/[OH⁻] = 10⁻¹⁴/(2.88 x 10⁻⁶) = 3.47 x 10⁻⁹ M.
<em>∵ pH = - log[H⁺]</em> = - log(3.47 x 10⁻⁹) = <em>8.459 ≅ 8.46.</em>
I think the correct answer from the choices listed above is option C. It would be octane that is an organic compound. <span>They are, any of a large class of chemical compounds in which one or more atoms of </span>carbon <span>are covalently linked to atoms of other elements, most commonly </span>hydrogen<span>, </span>oxygen<span>, or </span>nitrogen<span>.</span>
Answer:
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Explanation:
sience brob
The light intensity. The transparency of the filter, the bandwidth of the filter,
Also the color temperature of light source
This problem is providing the ratio of nitrogen to oxygen by mass in nitrogen monoxide, NO, as 7.0:8.0 and asks for the same ratio but in NO₂ and N₂O₇. After doing the calculations, the results are 7.0:16.0 and 1.0:4.0 respectively.
<h3>Mass ratios:</h3>
In chemistry, one can calculate the mass ratios in chemical formulas according to the atomic mass of each atom. In such a way, one knows the mass ratio of nitrogen to oxygen in NO is 7.0:8.0 because we divide the atomic mass of nitrogen by oxygens:
Now, for chemical formulas with subscripts, one must multiply the atomic mass of the element by the subscript in the formula, which is the case of NO₂ and N₂O₇ as shown below:
Therefore, the results for NO₂ and N₂O₇ are 7.0:16.0 and 1.0:4.0 respectively
Learn more about atomic masses: brainly.com/question/5566317