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Rufina [12.5K]
3 years ago
14

Why do some liquids form a convex surface when placed in a narrow test tube while others form a concave surface​

Chemistry
1 answer:
rewona [7]3 years ago
3 0

Answer:

When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. ... When liquid mercury is confined in a tube, its surface (meniscus) has a convex shape because the cohesive forces in liquid mercury tend to draw it into a drop.

Explanation: Have a great day!

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ZanzabumX [31]

Answer:

Is the fixed number of water molecules present in one formula unit of a substance

Explanation:

When copper sulphate is heated in a china dish, the blue colomed crystal changes to a white powder due to the removal of molecules of water of crystallization

6 0
3 years ago
ASAP!!
wariber [46]

2 x 3 = 6 + 3 x 3 = 9. 6 +9= 15 + 5 = 20. 10 + 15 = 25.

So, The Al2 O 3 is 20.

And the Fe is 15?

So the total of whatever it is is 25.

Sorry if it's wrong, I am a 13year old 7th grader, not in high school so it's probably wrong.

4 0
3 years ago
As the [H+] in a solution decreases, what happens to the [OH–]? A. It increases and the pH increases. B. It increases and the pH
AleksAgata [21]
<h3><u>Answer;</u></h3>

D. It decreases and the pH increases.

<h3><u>Explanation;</u></h3>
  • pH is a measure of the hydorgen ion concentration of a solution. Solutions with a high concentration of hydrogen ions have a low pH and solutions with a low concentrations of H+ ions have a high pH.
  • <em><u>[H+] and [OH-] are inversely related. Therefore; As the concentration of H+ increases the pH decreases. Since the concentrations of H+ and OH- are inversely proportional, as one goes up, the other goes down. </u></em>
  • <em><u>Therefore, an increase in OH- concentration will correspond to an increase in pH and a decrease in the concentration of H+.</u></em>
5 0
3 years ago
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Example of neutral outcome ?
Katarina [22]

Answer:

drops a glass cup of water outcome mad parents

Explanation:

Mad pagents mean death no surviva.

4 0
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The half reaction of an oxidation-reduction shows that iron gains electrons. What does this electron gain mean or iron?
ale4655 [162]

Answer:

C. its reduced

Explanation:

4 0
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