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aniked [119]
4 years ago
15

Oftentimes solubility of a compound limits the concentration of the solution that can be prepared. Use the solubility data given

with each compound shown below to determine which compound would allow the preparation of a 10.0 Molar solution.
A) AgNO3 (solubility = 122 g/100 g H2O)
B) KCl (solubility = 34.0 g/100 g H2O)
C) NaNO3 (solubility = 89.0 g/100 g H2O)
D) NH4Cl (solubility = 41.1 g/100 g H2O)
E) none of the above
Chemistry
1 answer:
bulgar [2K]4 years ago
3 0

Answer:

NaNO3 (solubility = 89.0 g/100 g H2O)

Explanation:

The solubility of a specie is the amount of solute that will dissolve in one litre of the solvent. Solubility is usually expressed in units of molarity.

Now let us calculate the molarity of the NaNO3 (solubility = 89.0 g/100 g H2O)

Molar mass of NaNO3= 23+14+3(16)= 85gmol-1

Mass of solute=89.0g

Amount of solute= mass of NaNO3/molar mass of NaNO3

Amount of solute= 89.0g/85.0 gmol-1

= 1.0moles of NaNO3

Note that 100g of water=100cm^3 of water.

If 1.0 moles of NaNO3 dissolve in 100cm^3 or water therefore,

x moles of NaNO3 will dissolve in 1000cm^3 of water

x= 1.0 × 1000/ 100

x= 10.0 moles of NaNO3

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mylen [45]

Answer:

Only one atom are bonded to the central atom in the F_{2}.

Explanation:

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The atomic number of fluorine is 9.

Electronic configuration - 1s^{2}2s^{2}2p^{4}

Hence, it required only one electron to get noble gas[Ne] electronic configuration.

In the F_{2} molecule two fluorine atoms are bonded by single covalent bond to get stability.

Each atom share one electron and form a bond.

The structure of F_{2} molecule is as follows.

3 0
3 years ago
List 3 complex carbohydrates (1pt x 3)
OLga [1]

Answer:

1. Starch

2. Cellulose (vegetable fibers)

3. Glycogen

Explanation:

Carbohydrates: They are bio-organic molecules synthesized by plants. these molecules are mainly made up of carbon, hydrogen and oxygen and consists of 1 to many sugar unit.

Sugar unit: C₆H₁₂O₆

on the basis of their unit and structural complexity there are three types of carbohydrates

1. Sugars:

These carbohydrates are composed of 1 to 2 units of glucose and these sugars have simple in structure and digestible and easily absorbed in blood.

2. Oligosaccharides:

These carbohydrates are composed of 3 to 9 units of glucose and these are the simplest polysaccharides are simple in structure and easily can be hydrolysed and digestible upon hydrolyzation easily absorbed in blood.

3. Polysaccarides:

These carbohydrates are composed of more than 9 units of glucose and these are complex in structures. These polysaccharides are of long chain and high wight and some of these can be hydrolysed and digestible upon hydrolyzation, but some can not be broken into simple sugar by hydrolyzation and can not be digested.

Now we have to explain about Complex Carbohydrates

1. Plant-derived digestible carbohydrate:

Plant synthesize carbohydrates and they stored in the form of oligosaccharides and polysaccarides that are of long chain and complex structure. Among these complex carbohydrates starch are digestible.

2. Plant-derived indigestible carbohydrate

Plant synthesize carbohydrates and they stored in the form of oligosaccharides and polysaccarides that are of long chain and complex structure. Among these complex carbohydrates cellulose (vegetable fibers) are insoluble and can not be digestive.

3. Animal-derived carbohydrate

Animals store the simple sugar in the form of glycogen. These glycogen are long chains of glucose and can be re-used by the body in need of energy

4 0
4 years ago
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Zolol [24]

Answer:

% is 51.6% of Oxygen

Explanation:

According to the working in the photo

3 0
4 years ago
Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system,
galina1969 [7]

Answer:

The options are

A.Surroundings get colder and the system decreases in volume.

B.Surroundings get hotter and the system expands in volume.

C.Surroundings get hotter and the system decreases in volume.

D.Surroundings get hotter and the system does not change in volume.

From the Most energy released to the most absorbed , the order is

B. Surroundings get hotter and the system expands in volume.

D. Surroundings get hotter and the system does not change in volume.

C. Surroundings get hotter and the system decreases in volume.

A. Surroundings get colder and the system decreases in volume.

6 0
4 years ago
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vladimir2022 [97]

Answer:

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8 0
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