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ivann1987 [24]
3 years ago
6

Describe two environmental problems associated with long chain molecules

Chemistry
1 answer:
Leya [2.2K]3 years ago
8 0

do you mean polymers or organic compounds?
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How do you represent a shared pair of electrons when drawing the Lewis structure of a covalent bond
nataly862011 [7]

Answer: Each pair of shared electrons is a covalent bond which can be represented by a dash.

Explanation:

In a Lewis dot structure, the central atom can share electrons through bonds with the surrounding atoms, and this can look like a dash between the atoms.

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3 years ago
The main reason that it's important to test only one variable at a time is so that
bonufazy [111]

D. quantitative data can be recorded.

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A sample of pure lithium chloride contains 16% lithium by mass. What is the % lithium by mass in a sample of pure lithium carbon
Anna35 [415]

Answer:

Percentage lithium by mass in Lithium carbonate sample = 19.0%

Explanation:

Atomic mass of lithium = 7.0 g; atomic mass of Chlorine = 35.5 g; atomic mass of carbon = 12.0 g; atomic mass of oxygen = 16.0 g

Molar mass of lithium chloride, LiCl = 7 + 35.5 = 42.5 g

Percentage by mass of lithium in LiCl = (7/42.5) * 100% = 16.4 % aproximately 16%

Molar mass of lithium carbonate, Li₂CO₃ = 7 * 2 + 12 + 16 * 3 =74.0 g

Percentage by mass of lithium in Li₂CO₃ = (14/74) * 100% = 18.9 % approximately 19%

Mass of Lithium carbonate sample = 2 * 42.5 = 85.0 g

mass of lithium in 85.0 g Li₂CO₃ = 19% * 85.0 g = 16.15 g

Percentage by mass of lithium in 85.0 g Li₂CO₃ = (16.15/85.0) * 100 % = 19.0%

Percentage lithium by mass in Lithium carbonate sample = 19.0%

3 0
3 years ago
I don't know whether to tell if my crush (the one in my school) likes me and i have a crush on jaden hossler and i've been havin
Anna11 [10]

Answer:

no way you both r meant to be

Explanation:

7 0
3 years ago
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3. An object has a mass of 20.0 grams and a volume of 5.0 cubic centimeters. Give the<br> density
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density= mass/ volume

d= 20/5

d= 4 g/cm^3

4 0
3 years ago
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