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valentinak56 [21]
3 years ago
6

Classify each material as a polymer or a composite. plywood ,plastic, concrete ,fiber glass ,paper ,nylon

Chemistry
2 answers:
guapka [62]3 years ago
7 0

A polymer is a single chained molecule that is  made up of repeating subunits called monomers. In contrast, a composite is a material that is made from combining two or more molecules with similar physical or chemical properties to produce a hybrid molecule.

Plywood- it is a composite made from sticking together thin strips of wood with glue to ake stable sheets.

Plastic- a polymer made of repeating units called monomers of some kind of organic compounds.

concrete- is a composite made from mixing water cement and rocks. The mixture is not repeating and can branch in different ways which discounts it from being a polymer.

fiberglass- is a composite made that has no repeating units but made from plastic and glass fiber.

paper- is a polymer made of a repeating units of a specific monomer.

nylon- is a polymer manufactured by reacting repeating units of monomers.

damaskus [11]3 years ago
4 0
Plywood: Composite
Plastic: Polymer
Concrete: Composite
Fiber: Could be either or depending on the type of Fiber
Glass: Composite, yet made of polymers
Paper: Could be either. For example composite would be paper mache or recycled paper however plain paper would be polymer.
Nylon: Polymer
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How many total moles of ions are released when the following sample dissolves completely in water?
pogonyaev

Answer:

                      8.55 × 10²⁴ Ions

Explanation:

                    Ammonium Chloride is an ionic compound which contains a monatomic anion (Cl⁻ ; Chloride) and a polyatomic cation (NH₄⁺ ; Ammonium).

Hence, when added in water Ammonium Chloride ionizes as;

                                      NH₄Cl   →    NH₄⁺  +  Cl⁻

Hence, we can say that it produces two ions when dissolved in water.

Also,

We know that 1 mole of any substance contains exactly 6.022 × 10²³ particles which is also called as Avogadro's Number. So in order to calculate the number of ions  contained by 7.1 moles of NH₄Cl, we will use following relation to first calculate the number of molecules as;

          Moles  =  Number of Molecules ÷ 6.022 × 10²³ Molecules.mol⁻¹

Solving for Number of Molecules,

          Number of Molecules  =  Moles × 6.022 × 10²³ Molecules.mol⁻¹

Putting values,

          Number of Molecules  =  7.1 mol × 6.022 × 10²³

          Number of Molecules  =  4.27 × 10²⁴ Molecules

So,

As,

                         1 Molecule of NH₄Cl contained  =  2 Ions

So,

              4.27 × 10²⁴ Molecules of NH₄Cl will contain  =  X ions

Solving for X,

                     X =  2 Ions × 4.27 × 10²⁴ Molecules / 1 Molecule

                    X =  8.55 × 10²⁴ Ions

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