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Alexeev081 [22]
3 years ago
15

NEED HELP FAST

Chemistry
1 answer:
Blababa [14]3 years ago
6 0

Answer: 1. Ethylene is a stable molecule with two carbon atoms connected by a double bond. Polyethylene is made by the reaction of multiple ethylene molecules in the presence of a catalyst.

2. The term “plastics” includes materials composed of various elements such as carbon, hydrogen, oxygen, nitrogen, chlorine, and sulfur.

3. Polyethylene (PE) is made by the reaction of multiple ethylene molecules in the presence of catalysts to break the double bond and connect the carbon atoms into a chain . The longer the chain, the higher the molecular weight. Polymers can have molecular weights in the millions.

Explanation:

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Condensation is the process of watervapor in the air is changing into liquid water. Condensation is crucial to the water cycle because it is responsible for the formation of clouds. Condensation is also the opposite of evaporation
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3 years ago
Perform the following mathematical operation, and report the answer to the appropriate number of significant figures.
nordsb [41]

Answer:

12.306

Explanation:

12.3+0.005675=12.305675 just put answer as 12.306

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Which of these is an example of a physical change?
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Sugar dissolved in water
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What is the formula name for Co3N2
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3 years ago
Ocean water contains 3.5 % NaCl by mass. What mass of ocean water in grams contains 46.8 g of NaCl?
Luda [366]

Answer:

1.3 kg

Explanation:

Mass of ocean water = mass of NaCl × (mass of ocean water/mass NaCl).

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Mass of ocean water = 46.8 × (100/3.5)

Mass of ocean water = 46.8 × 28.6

Mass of ocean water = 1300 g = 1.3 kg

<em>Note</em>: The answer can have only <em>two significant figures</em> because that is all you gave for the percentage of NaCl.

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