CHEMISTRY HIGH SCHOOL

Which of the following is not an example of a polymer?Select one:
a. Polystyrene
b. Nylon
c. Sucrose
d. PVC

Answers

Answer 1
Answer:

The answer is: sucrose.

Polystyrene, nylon and PVC are examples of a polymer.

Sucrose or table sugar (C₁₂O₂₂O₁₁) composed of two monosaccharides. This monosaccharides glucose and fructose are linked with an ether bond between C1 on the glucosyl subunit and C2 on the fructosyl unit.

Polystyrene is a synthetic aromatic hydrocarbon polymer made from the monomer styrene.

Styrene (ethenylbenzene) is an organic compound with the chemical formula C₆H₅CH=CH₂. It is a colorless oily liquid.

Plastic PVC is organic polymers of high molecular mass derived from petrochemicals.
Answer 2
Answer:

Final answer:

Among Polystyrene, Nylon, PVC, and Sucrose, the compound that is not a polymer is Sucrose because it is a smaller, simple molecule comprised of two monosaccharides and does not have a long chain of repeating units.

Explanation:

In considering the options provided, Polystyrene, Nylon, and PVC are all polymers. Polymers are made up of many similar units or monomers, and they typically have high molecular weights. Polystyrene, Nylon, and PVC, which stands for Polyvinyl Chloride, are large molecules made up of repeating subunits. The only one which does not fit this particular basis is Sucrose.

Sucrose, commonly known as table sugar, is a small, simple molecule. It is a disaccharide, meaning it is composed of two monosaccharides, glucose and fructose. Therefore, it is not a polymer because it does not contain a long chain of repeating units.

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What is the scale factor used to create a model of an animal from the actual animal? 1) 1:10 2) 1:20 3) 1:30 4) 1:40

Answers

The scale factor used to create a model of an animal from the actual animal depends on the size and details required for the model. However, among the options provided, the most commonly used scale factor for creating detailed animal models is 1:40.

In which substance do the molecules have the strongest attractions to one another?a. sugar, a solid
c. sulfuric acid, a liquid
b. hydrogen, a gas
d. water, a liquid

Answers

The substance that the molecules have the strongest attractions to one another is the sugar, a solid. The answer is letter A. The solid has a more definite shape and volume. The particles are locked into place. It cannot be further compressed due to the bond that exists between the molecules. The kinetic energy of the molecules is close to none because the molecules are so close and so compact with each other.

Answer:

a

Explanation:

Select the ion.

1)Cu
2)PO4-3
3)SO2

Answers

I believe the answer is B. PO4-3

Answer:

Explanation:  the answer is B. PO4-3

Which barium salt is insoluble in water?A) BaCO3. B) BaCl2
C) Ba(ClO4)2. D) Ba(NO3)2

Answers

\boxed{{\text{A) BaC}}{{\text{O}}_{\text{3}}}} is insoluble in water.

Further Explanation:

Solubility rules

These help in predicting whether the given compound is soluble or insoluble in nature. Some of the solubility rules are as follows:

1. Group 1A compounds are soluble in nature.

2. All the common compounds of ammonium ion and all acetates, chlorides, nitrates, bromides, iodides, and perchlorates are soluble in nature. But the ions whose chlorides, bromides, and iodides are not soluble are {\text{A}}{{\text{g}}^ + }, {\text{P}}{{\text{b}}^(2 + )}, {\text{C}}{{\text{u}}^ + } and {\text{Hg}}_2^(2 + ).

3. All common fluorides, except for {\text{Pb}}{{\text{F}}_{\text{2}}} and group 2A fluorides are soluble. Also, all sulfates except {\text{CaS}}{{\text{O}}_{\text{4}}}, {\text{SrS}}{{\text{O}}_{\text{4}}}, {\text{BaS}}{{\text{O}}_{\text{4}}}, {\text{A}}{{\text{g}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}} and {\text{PbS}}{{\text{O}}_{\text{4}}} are soluble.

4. All common metal hydroxides except {\text{Ca}}{\left( {{\text{OH}}} \right)_{\text{2}}}, {\text{Sr}}{\left( {{\text{OH}}} \right)_{\text{2}}},   {\text{Ba}}{\left( {{\text{OH}}} \right)_{\text{2}}} and hydroxides of group 1A and that of transition metals are insoluble in nature.

5. All carbonates are insoluble in nature, except for sodium, potassium and ammonium.

6. Salts having ions like \text{Cl}^-, \text{Br}^- or \text{I}^- are generally soluble except those of \text{Ag}^+,  \text{Pb}^(2+) and {\left( {{\text{H}}{{\text{g}}_2}} \right)^{{\text{2 + }}}}.

7. Group 1A and group 2A perchlorates are soluble in nature.

8. All sulfates of metals are soluble, except for lead, mercury (I), barium, and calcium sulfates.

9. The salts having nitrate ions are soluble in nature.

According to the solubility rules, only carbonates of sodium, potassium and ammonium are soluble in nature. So barium carbonate \left( {{\text{BaC}}{{\text{O}}_{\text{3}}}} \right) is insoluble in nature. But chlorides, nitrates and perchlorates of barium are soluble in water. Therefore option A is the correct answer.

Learn more:

  1. Identify the precipitate in the reaction: brainly.com/question/8896163
  2. What type of reaction occurs by mixing barium sulfide and sulfuric acid? brainly.com/question/5464325

Answer details:

Grade: Senior School

Chapter: Chemical reaction and equation

Subject: Chemistry

Keywords: barium, water, insoluble, solubility rules, soluble, insoluble, water, BaCO3.

BaCO₃ is generally considered insoluble in water. Carbonates are often insoluble, except for some alkali metals and ammonium carbonates. Therefore, option A is correct.

The solubility of salt depends on its nature and the interactions between its ions and water molecules. In this case, determine the solubility of each salt by considering the common solubility rules.

BaCl₂ is soluble in water. Chlorides (Cl-) are mostly soluble except for a few exceptions, such as silver chloride, lead chloride, and mercury(I) chloride.

Ba(ClO₄)₂ is soluble in water. Perchlorates (ClO4-) are typically soluble.

Ba(NO₃)₂ is soluble in water. Nitrates (NO3-) are mostly soluble.

Based on the solubility rules, the salt that is insoluble in water is BaCO₃ (barium carbonate).

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I Need Help With These.

Answers

You have to use the equation P₁V₁=P₂V₂ for the first 2 questions and V₁/T₁=V₂/T₂ for the third one.

1) Since you have to find the final volume you have to solve the equation above for V₂ to get V₂=P₁V₁/P₂
P₁=1atm
V₁=2.00L
P₂=6x10^4atm
when you plug everything in you should get 3.33x10^-5 L

2) You are again trying to find V₂ so use the equation V₂=P₁V₁/P₂
P₁=1.2atm
V₁=15000L
P₂=250atm
when you plug everything in you should get 72L

3) we are trying to find the final volume so use the equation V₂=V₁T₂/T₁
V₁=2.2L
T₁=14.2°C (convert this into 287.2K since most gas law equations require the use of kelvin) 
T₂=38.98°C (tern this to 311.98K for the same reason as above)
when you plug everything in you should get 2.39L

I hope this helps.  Let me know in the comments if anything if anything is unclear.

Which reaction type? *combination (synthesis)
combustion
decomposition
single replacement
double replacement

Answers

Single replacement.

Mg replaces the H in HCl to become MgCl2.
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