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poizon [28]
3 years ago
12

Consider the reaction for the dissolution of solid magnesium hydroxide.

Chemistry
1 answer:
sp2606 [1]3 years ago
4 0

Answer:

Molar solubility is 1.12x10⁻⁴M

Explanation:

The dissolution of magnesium hydroxide is:

Mg(OH)₂(s) ⇄ Mg²⁺ + 2OH⁻

The molar solubility represents the moles of the solid that the solution can dissolve, that could be written as:

Mg(OH)₂(s) ⇄ X + 2X

<em>Where X is solubility.</em>

<em />

If you obtained a [OH⁻] = 2.24x10⁻⁴M and you know [OH⁻] = 2X:

2X = 2.24x10⁻⁴M

X = 2.24x10⁻⁴M/2

X =1.12x10⁻⁴M

<h3>Molar solubility is 1.12x10⁻⁴M</h3>
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Determine the grams of protein in one cup of soup that has 140 kcal with 8 g of carbohydrate and 2 g of fat.
irina [24]

There are 22.5 grams of protein in one cup of soup that has 140 kcal with 8 g of carbohydrate and 2 g of fat.

<h3>What is the mass of a substance?</h3>

The mass of a substance is the quantity of the substance that is being measured in grams or kilograms.

To determine the energy from the 8g of carbohydrate, we have:

= 8g × 4 kcal/g (the corresponding calories of food type)

= 32 kcal

The energy from 2g of fat = 2g × 9 kcal/g

= 18 kcal

The energy from protein is calculated as:

= 140 kcal - 32 kcal - 18 kcal

= 90 kcal

The required mass of the protein in grams is:

\mathbf{= 90 \ kcal \times \dfrac{1}{4 \  kcal }}

= 22.5 grams

Therefore, we can conclude that there are 22.5 grams of protein in one cup of soup.

Learn more about the mass of a substance here:

brainly.com/question/837939

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7 0
2 years ago
Calculate the number of moles of solute present and the number of grams
nekit [7.7K]

Answer:

The answer is: 18 moles and 1341, 72 grams of KCl

Explanation:

The molarity is defined as the moles of solute ( in this case KCl) in 1 liter of solution:

1L solution-----3 moles of KCl

6L solution-----x= (6L solutionx 3 moles of KCl)/1 L solution= <em>18 moles of KCl</em>

<em></em>

We calculate the weight of 1 mol of KCl:

Weight 1 mol KCl= Weight K + Weight Cl= 39,09 g + 35, 45 g=74, 54 g/mol

1 mol KCl----- 74, 54 g

18 mol KCl----x= (18 mol KCl x 74, 54 g)/1 mol KCl=<em>1341, 72 g</em>

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4 years ago
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Answer:

Random movements of the dye and water molecules cause them to bump into each other and mix. Thus, the dye molecules move from an area of higher concentration to an area of lower concentration. Eventually, they are evenly spread throughout the solution. This means the molecules have reached a dynamic equilibrium.

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Diffusion and Osmosis

Explanation:

found this online. hope this helps

3 0
3 years ago
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The citizens of a town are aware of climate change, and they want to make changes to control it. One change they consider is rep
likoan [24]

Answer: How hydroelectric plant is better over thermal power plant in creating less pollution?

Explanation:

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3 years ago
A solution of the weak acid HA is prepared by dissolving 2.70 g of HA in 100.0 mL water. The solution is titrated, and the equiv
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