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borishaifa [10]
3 years ago
14

Why is burning of plastics not considered a good method for their disposal?

Chemistry
1 answer:
Sindrei [870]3 years ago
6 0
Plastics release chemicals and fumes when burned which can harm the enviroment around them. A good method for their disposal would be recycling them so they can later be used as something else.
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A 8.249 gram sample of copper is heated in the presence of excess fluorine. A metal fluoride is formed with a mass of 13.18 g. D
levacccp [35]

Answer:

CuF_2 the empirical formula of the metal fluoride.

Explanation:

Mass of copper heated = 8.249 g

Mass of copper fluoride formed = 13.18 g

Mass of fluorine gas in copper fluoride = x

13.18 g = 8.249 g + x\\x= 13.18 - 8.249 g = 4.931 g

Moles of copper :

= \frac{8.249 g}{63.546 g/mol}=0.1298 mol

Moles of fluorine:

= \frac{4.931 g}{18.998 g/mol}=0.2596 mol

For the empirical formula divide the smallest mole of an element with all the moles of elements present in the compound.

Copper= \frac{0.1298 mol}{0.1298 mol}=1\\Fluorine = \frac{0.2596 mol}{0.1298 mol}=2

The empirical formula of the copper fluoride = CuF_2

CuF_2 the empirical formula of the metal fluoride.

6 0
3 years ago
Brass alloy is best described as _______.
Vladimir79 [104]

Answer:

it's mixture

Explanation:

i did it on study island

8 0
4 years ago
Melting gold with other metals makes 10-karat gold. Which term best describes 10-karat gold?(1 point)
Arte-miy333 [17]
2heterroge is the answer
4 0
2 years ago
Explain how the isotopes of an element differ
patriot [66]

Isotopes of an element will contain the same number of protons and electrons but will differ in the number of neutrons they contain. In other words, isotopes have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.

8 0
4 years ago
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An naoh solution contains 1.90 mol of naoh, and its concentration is 0.555 m. what is its volume?
Firlakuza [10]
0.555 = 1.90/V
⇒ V = 1.90/0.555
⇒ V = 3.423 liter
6 0
3 years ago
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