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Lelu [443]
3 years ago
6

Kevlar is a synthetic polymer that was marketed for the first time in 1971. It is difficult to cut and does not shrink when expo

sed to cold temperature. It will not rust or corrode, and it can be immersed in water without being affected. Kevlar has low chemical reactivity and is an insulator. It is flame resistant and will not melt or soften at high temperatures. How could this negatively affect society? A) It will not chemically react to acid rain like many other materials. B) Tire companies will not sell as many tires since they would not fail as easily. C) It would be more difficult and costly to dispose since it does not naturally break down easily. D) Bullets will no longer be able to penetrate materials made of Kevlar as easily as other materials.
Chemistry
2 answers:
ohaa [14]3 years ago
6 0

Answer:

The correct option is C

Explanation:

The negative impact of kevlar in the society is that it can not just be disposed via conventional methods. It's resistance to flame and  and high temperature means burning it will not dispose it. Also, its water resistant property means kevlar will obstruct drainages if thrown in the drainage - because when it piles up, water will not be able to pass through it hence obstructing the flow of water. It being difficult to cut, with its low reactivity and it's non-corrosive property means it will be very difficult and expensive to dispose

lubasha [3.4K]3 years ago
3 0
C. because it doesn't break down without chemicals, so it would eventually just pile up.
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An ice cube is placed in 80 mL of 70oC water. When the ice melts the temperature of the water is 60oC. a. How much energy was ne
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Answer:

800 degrees C g, I found this answer by using the formula to find how much energy was need to melt the ice. First you figure out the temperature change of ur ice (starting temp and ur final temp), and then you times that with the mass of the water.

8 0
3 years ago
How many grams of Ca(OH)2are required to make 1.5 L of a 0.81 M solution?
FrozenT [24]

Answer:

Mass = 90.28 g

Explanation:

Given data:

Mass of Ca(OH)₂ = ?

Volume of solution= 1.5 L

Molarity of solution = 0.81 M

Solution:

First of all we will calculate number of moles.

Molarity = number of moles / volume in L

by putting values,

0.81 M = Number of moles / 1.5 L

Number of moles = 0.81 M × 1.5 L

Number of moles = 1.22 mol

Mass of Ca(OH)₂ in gram:

Mass = number of moles × molar mass

Mass = 1.22 mol × 74.09 g/mol

Mass = 90.28 g

5 0
3 years ago
Write the overall, balanced molecular equation and indicate which element is oxidized and which is reduced for the following rea
REY [17]

Explanation:

Mg(s) + Cr(C2H3O2)3 (aq)

Overall, balanced molecular equation

Mg(s) + Cr(C2H3O2)3(aq) --> Mg(C2H3O2)3(aq) + Cr(s)

To identify if an element has been reduced or oxidized, the oxidation number is observed in both the reactant and product phase.

An increase in oxidation number denotes that the element has been oxidized.

A decrease in oxidation number denotes that the element has been reduced.

Oxidation number of Mg:

Reactant - 0

Product - +3

Oxidation number of Cr:

Reactant - +3

Product - 0

Note: C2H3O2 is actually acetate ion; CH3COO- The oxidatioon number of C, H and O do not change.

Oxidized : Mg

Reduced : Cr

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I hope the answer is right


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2 years ago
Is work done whenever you hold a heavy object for a long time?
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No, work is not done whenever you hold a heavy object for a long time

<h3>What is work done ?</h3>

The result of a force's displacement and its component of force exerted by the object in the direction of displacement is what is known as the force's work. When we push a block with some force, the body moves quickly and work is completed.

  • No work, as that term is used here, is done until the object is moved in some way and a component of the force travels along the path that the object is moved. Because there is no displacement when holding a heavy object still, energy is not transferred to it.

Learn more about Work done here:

brainly.com/question/25573309

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7 0
1 year ago
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