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3 years ago

Which of the following options is correct?

Chemistry

1 answer:

Elena-2011 [213]3 years ago

8 0

Answer:

b. cellulose.

Explanation:

Cellulose is a polysaccharide consisting of a long chain of repeating glucose units (i.e., β-D-glucose units) that produce long unbranched chains. Cellulose can be considered as a natural polymer (i.e., a non-modified carbohydrate) because it is composed of repeated chains of β-D-glucose molecules stuck together. The cellulose polysaccharide is a principal component of plant cell walls.

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How many iodide ions are present in 65.5ml of .210 m AlI3 solution

blondinia [14]

Answer:

$2.48\times 10^{22} ions$ are present in solution.

Explanation:

Molarity of the solution = 0.210 M

Volume of the solution = 65.5 ml = 0.0655 L

Moles of aluminum iodide= n

$Molarity=\frac{\text{Moles of compound}}{\text{Volume of the solution(L)}}$

$0.210M=\frac{n}{0.0655 L}$

n = 0.013755 moles of aluminum iodide

1 mole of aluminum iodide contains 3 moles of iodide ions:

Then 0.013755 moles of aluminum iodide will contain:

$3\times 0.013755 moles=0.041265 mol$ of iodide ions

Number of iodide ions in 0.041265 moles:

$0.041265 mol\times 6.022\times 10^{23}=2.48\times 10^{22} ions$

$2.48\times 10^{22} ions$ are present in solution.

7 0

4 years ago

An example of a double comparison is _____.

andriy [413]

The answer is C. more better. Like I'm better everyday :D

GIVE ME MORE QUESTIONS FOR MORE POINTS PLEASE :D
have a nice day :) happy new year

4 0

3 years ago

How are ironic bonds and covalent bonds different and how are they different?

Vinil7 [7]

Ionic bonds are forces that hold together electrostatic forces of attractions between oppositely charged ions. Ionic bonds have an electronegativity difference greater than or equal to 2. Covalent bonds have an electronegativity difference that is less than 2.

3 0

4 years ago

Do plants have to do cellular respiration?<br> Why or why not?

kozerog [31]

Answer:

<h3>Plants need oxygen because plants are made living cells which need to perform cellular respiration to get the energy they need to function. Admittedly, needing to perform cellular respiration alone does not mean that consuming oxygen is required - many (micro)organisms use fermentation or anaerobic respiration.</h3>

8 0

2 years ago

The salts in the sea come from

Luda [366]

D) organisms that live in the sea

4 0

3 years ago