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Maurinko [17]
3 years ago
15

How many milliliters of a 20% solution should be added to 60 ml of a 40% solution to obtain a 35% solution?

Chemistry
1 answer:
weqwewe [10]3 years ago
3 0
Add water to the sugar<span> and </span>pepper<span> and stir until the </span>sugar<span> is dissolved (</span>black pepper<span> will mix into the water but not dissolve.</span>
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Cual es la relación de la temperatura y la solubilidad?
DanielleElmas [232]

Answer:

A medida que aumenta la temperatura de un líquido, la solubilidad de los gases en ese líquido disminuye. Podemos usar la Segunda Ley de la Termodinámica para explicar por qué. Calentar una solución de un gas permite que las partículas de gas se muevan más libremente entre la solución y la fase gaseosa. La Segunda Ley predice que cambiarán al estado más desordenado, más altamente disperso y, por lo tanto, más probablemente gaseoso.

Explanation:

8 0
3 years ago
When the temperature of a sample of pure water is raised above 25 °C,(1)the hydronium ion concentration will be greater than the
Ludmilka [50]

Answer:

The correct answer is option 3.

Explanation:

H_2O\rightleftharpoons H^++OH^-

The expression of K_w is given by :

K_w=[H^+][OH^-]

K_w\propto [H^+]

K_w\propto [OH^-]

Rise in temperature will result in more dissociation of water molecules into hydrogen ions and hydroxide ions.

With an increase in concentration of hydrogen ions and hydroxide ions value of K_w will also increase.

5 0
4 years ago
In the close-pack model for hard spheres, there are repeating voids in the 3D lattice that are created. When a second layer is a
nataly862011 [7]

Answer:

close-pack model for hard spheres, there are repeating voids in the 3D lattice that are created. When a second layer is added to the first...

Explanation:

3 0
4 years ago
Read 2 more answers
Which group on the Periodic Table has at least one element in each of the three phases of matter at STP?
pychu [463]

Answer:

Halogens

Explanation:

Fluorine and Chlorine are gases at room temperature.

Bromine is a liquid at room temperature.

Tennessine, Iodine, and Astatine are all solids at room temperature.

4 0
3 years ago
Read 2 more answers
Suppose a thin sheet of zinc containing 0.2 mol of the metal is completely converted in air to zinc oxide (zno) in one month. ho
hram777 [196]
Molecular mass of  Zn = 65.38  
<span>1 mol = 65 g </span>
<span>0.2 mol of Zinc = 13.076 g of Zinc </span>

<span>13.076 g of Zinc is completely converted in air to ZnO </span><span>in one month
= 13.076 g / 30 days = 0.435 g per day 
</span>
<span>The rate of conversion of the zinc = 0.44 g / day</span>
8 0
3 years ago
Read 2 more answers
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