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Elza [17]
2 years ago
7

All of the following describe the unique role of water except-

Chemistry
1 answer:
9966 [12]2 years ago
6 0
Option c
water is non polar and can dissolve non polar compounds such as oil
water is unable to dissolve or mix with substances like oil therefore making the statement false
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A buffer is prepared by adding 139 mL of 0.39 M NH3 to 169 mL of 0.19 M NH4NO3. What is the pH of the final solution? (Assume th
Paha777 [63]

Answer:

pH = 9.48

Explanation:

We have first to realize that NH₃ is a weak base:

NH₃ + H₂O ⇔ NH₄⁺ + OH⁻     Kb = 1.8 x 10⁻⁵

and we are adding this weak base to a solution of NH₄NO₃ which being a salt dissociates 100 % in water.

Effectively what we have here is a buffer of a weak base and its conjugate acid. Therefore, we need the Henderson-Hasselbach formula for weak bases given by:

pOH = pKb + log ( [ conjugate acid ] / [  weak base ]

mol NH₃ = 0.139 L x 0.39 M = 0.054 mol

mol NH₄⁺ = 0.169 L x 0.19 M = 0.032 mol

Now we have all the information required to calculate the pOH ( Note that we dont have to calculate the concentrations since in the formula they are a ratio and the volume will cancel out)

pOH = -log(1.8 x 10⁻⁵) + log ( 0.032/0.054) = 4.52

pOH + pH = 14 ⇒ pH = 14 - 4.52 = 9.48

The solution is basic which agrees  with NH₃ being  a weak base.

5 0
3 years ago
I need help with my math but you can only choose one correct answer​
Anika [276]

Answer:

Explanation:

Decomposition is the answer.

If a compound breaks into two or more parts then it is called decomposition.

7 0
2 years ago
Read 2 more answers
What is a real life example of osmotic pressure?
Alexus [3.1K]
<span>Animal Cells 
</span><span>Water Soak
</span><span> Slug Murder
</span><span>Root Pressure
</span><span>Cholera
</span><span>Pruned Fingers
</span><span>The Water Crisis</span>
4 0
3 years ago
Isotopes are created by adding or removing neutrons from the nucleus.
valina [46]

Answer:

<h2>This is <u>TRUE</u><u> </u>statement... </h2>

<u>Explanation</u><u>:</u><u> </u>

When you remove or add a neutron to the nucleus of an atom, the resulting substance is a new type of the same element and is called an isotope.

<h2><em><u>Hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helps</u></em><em><u> </u></em><em><u>you</u></em><em><u>✨</u></em><em><u>.</u></em></h2>

<em><u>Thanks</u></em><em><u>☸</u></em><em><u>☸</u></em>

4 0
3 years ago
Which is a constructive process? Rivers carrying sediment down stream, the rusting of a bridge, waves cutting back a beach front
julia-pushkina [17]

Answer:

volcanic eruption caused by plate tectonics.

Explanation:

Constructive process is one in which memories are influenced by some events. When a person tries to retrieve the memory he first click some event which is associated with that memory and then whole flash backs comes to his mind.

6 0
3 years ago
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