Where might you find products made from polystyrene

1 answer:

6 0

It can be cast into moulds with fine detail, for example yogurt cups, plastic cutlery and CD and DVD cases. Polystyrene can be transparent or can be made to take on various colours. Products made from foamed polystyrene are nearly everywhere, for example packing materials, insulation, and foam beverage cups.

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What are the three important things needed for combustion to occur ?

marissa [1.9K]

Explanation:

Here is the answer hope you do well

4 0

3 years ago

How many grams of ethanol (density 0.80 g/cm 3) should be added to 5.0 g of chloroform (density 1.5 g/cm 3) if the resulting mix

kaheart [24]

Answer:

9.2 grams of ethanol should be added.

Explanation:

Let the mass of ethanol be x

Density of an ethanol = $d_1=0.80 g/cm^3$

Volume of the ethanol = $V_1=\frac{x}{0.80 g/cm^3}$

Mass of chloroform = 5.0 g

Density of an chloroform= $d_2=1.5 g/cm^3$

Volume of the ethanol = $V_2=\frac{5.0 g}{1.5 g/cm^3}=\frac{1}{3}$

Mass of the mixture,m = x + 5.0 g

Density of the mixture = $d=1.2 g/cm^3$

Volume of the mixture= $V=\frac{m}{1.2 g/cm^3}=\frac{x+5.0 g}{1.2 g/cm^3}$

$V=V_1+V_2$

$\frac{x+5.0 g}{1.2 g/cm^3}=V_1+\frac{1}{3}$

$\frac{x+5.0 g}{1.2 g/cm^3}=\frac{x}{0.80 g/cm^3}+\frac{1}{3}$

Solving for x , we get

x = 9.2 g

9.2 grams of ethanol should be added.

8 0

3 years ago

Los átomos que no poseen _______________ son conocidos como _________________ ________________. Los átomos que poseen carga se d

irakobra [83]

Answer:

La respuesta está en la explicación

Explanation:

Los átomos que no poseen ___CARGA____ son conocidos como ____ÁTOMOS____ ____NEUTROS_____. Los átomos que poseen carga se denominan ___IONES____, aquellos con carga positiva de llaman ____PROTONES____ y son aquellos que __PIERDEN__ electrones. Los ______ANIONES____ son aquellos con carga negativa y son los que _____GANAN___ electrones. Para todos los casos el valor de _MASA__ y _NÚMERO ATÓMICO_ permanecen iguales y son los que sacamos de la tabla periódica.