PH scale is used to determine how acidic, basic or neutral a solution is.
pH is calculated using the hydrogen ion concentration
pH = -log[H⁺]
if we know the pH we can calculate the H⁺ concentration
[H⁺] = antilog(-pH)
[H⁺] = 1.26 x 10⁻⁸ M
therefore [H⁺] is 1.26 x 10⁻⁸ M
1. color change 2. gas formation 3. temperature change ( heat, light,cold) 4. precipitate formed.
<span>I'd chose D. In all five years of the study, the control resulted in the least soil erosion as well as substantially less water loss compared to the two treatment situations. </span>
The radius of the aluminum cylinder is 0.258cm
HOW TO CALCULATE VOLUME OF A CYLINDER:
- The volume of a cylinder can be calculated by using the formula below:
V=πr²h
Where;
V = volume (cm³)
r = radius (cm)
h = height (cm)
- To calculate the radius of the aluminum cylinder, the volume is required. The volume can be calculated using the formula as follows:
Volume = mass ÷ density
Volume = 1.22 ÷ 2.70
Volume = 0.452 cm³
- The radius can be calculated with the volume and height known as follows:
r = √v/πh
r = √0.452 ÷ (3.142 × 2.16)
r = √0.452 ÷ 6.78
r = √0.067
r = 0.258cm
Therefore, the radius of the aluminum cylinder is 0.258cm.
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Answer:
It obeys rule
Explanation:
Benzene is an aromatic hydrocarbon because it obeys Hückel's rule.
