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2 years ago

Describe several uses for plastic and explain why plastic is a good choice for these properties

2 answers:

7 0

Plastic is used in several in the worlds toys, bags and products. Its a good choice for these properties because plastic is a low cost and is very durable and flexible allowing it to ease the process of making these products.

Trava [24]2 years ago

6 0

Plastics are used in almost all spheres of life for diverse purposes because of their beneficial properties. The uses of plastics include the following:

1. Plastics are used in the manufacturing of various items that we use in our homes such as television, phones, radio, vacuum cleaners, chairs, bowls plates, tables, etc.

2. Plastics are used in the food industry for packaging of foods.

3. Plastics are used in the transport industry for various purposes in the manufacture of cars, trains, aeroplanes, hydroplanes, ships, satellites, etc.

4. Plastics are also used in the medical and pharmaceutical industries for various purposes.

Manufacturers are able to use plastics for various purpose because of their properties, which include: resistance to corrosion, resistance to chemicals, low thermal conductivity, color variability, high strength to weight ratio, resistance to shock, durability, low toxicity, ready availability, cheap, etc.

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Using the reaction below: 2 CO2(g) + 2 H2O(l) → C2H4(g) + 3 O2(g) ΔHrxn= +1411.1 kJ What would be the heat of reaction for this

maw [93]

Answer: d) -705.55 kJ

Explanation:

Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.

$2CO_2(g)+2H_2O(l)\rightarrow C_2H_4(g)+3O_2(g)$ $\Delta H=+1411.1kJ$

Reversing the reaction, changes the sign of $\Delta H$

$C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(l)$

$\Delta H=-1411.1kJ$

On multiplying the reaction by $\frac{1}{2}$ , enthalpy gets half:

$0.5C_2H_4(g)+1.5O_2(g)\rightarrow CO_2(g)+H_2O(l)$ $\Delta H=\frac{1}{2}\times -1411.1kJ=-705.55kJ/mol$

Thus the enthalpy change for the given reaction is -705.55kJ

7 0

3 years ago

16. Mass = 10g

inessss [21]

Actual volume=Final Volume-initial volume

$\\ \sf\longmapsto 50ml-30ml=20ml$

Now

$\\ \sf\longmapsto Density=\dfrac{Mass}{Volume}$

$\\ \sf\longmapsto Density=\dfrac{10}{20}$

$\\ \sf\longmapsto Density=2g/ml$

3 0

2 years ago

Becomes caramel. He pushes

kozerog [31]

Answer:

Turning Sugar into Caramel

Explanation:

You turn sugar into caramel by burning sugar. Burning sugar is a chemical change.

5 0

3 years ago

PLS HELP IF YOU WANT A BRAINLIEST BEST ANSWER CHOICE GETS BRAINLIEST Which describes the two cells formed through mitosis?

luda_lava [24]

Answer:C

Explanation:

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3 years ago

Which gas diffuses most rapidly when they are all at the same temperature and pressure? He, O2, NH3, H2S, or They all diffuse at

Sonbull [250]

Answer:

Explanation:

From Graham's law of diffusion, lighter or less dense gas tends to diffuse faster than denser gas amongst the list, He is the lightest gas and so will diffuse faster

4 0

2 years ago