Answer:
The correct option is: b. pH 6.4-8.0
Explanation:
Phenol red is a weak acid that is used as a pH indicator and exists in the form of stable red crystals.
<u>The color of the phenol red solution changes from yellow to red when the change in pH is observed. The color of phenol red transitions from yellow to red when the pH is 6.8 - 8.2 or 6.4 - 8.0</u>
Above the pH of 8.2, the phenol red solution turns a bright pink in color.
Conducters e.g gold copper silver
Well to find speed you have to do distance /time. So, in this case you do 112m /29s which it will be 3.862 which if you round it, it will be 3.86 m/s
Answer:
CaCO3 -> CaO + CO2
Explanation:
Woahhhh, did you balance it yourself just then?
<h3>Zinc +oxygen - zinc oxide</h3>
<h3><em>chlorine</em><em>+</em><em> </em><em>magnesium</em><em> </em><em>-</em><em> </em><em>magnesium</em><em> </em><em>dichloride</em></h3><h3><em>iron</em><em> </em><em>+</em><em> </em><em>arsenic</em><em> </em><em>-</em><em> </em><em>ferric</em><em> </em><em>arsenate</em></h3>
<h2><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>Hope</em><em> </em><em>it</em><em> </em><em>is</em><em> </em><em>helpful</em><em> </em><em>for</em><em> </em><em>you</em></h2>
