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Shkiper50 [21]
3 years ago
14

When a plant responds to changes in the length of day by flowering during certain seasons, it is called

Chemistry
2 answers:
lina2011 [118]3 years ago
8 0

Answer: photoperiodism

Zanzabum3 years ago
7 0

Answer:  photoperiodism

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The black, granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell) is mangane
mestny [16]

Answer: c. +4

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

Mn:25:1s^22s^22p^63s^23p^64s^23d^{5}

Mn^{4+}:21:1s^22s^22p^63s^23p^63d^1

O:8:1s^22s^22p^4

O^{2-}:10:1s^22s^22p^6

Here manganese is having an oxidation state of +4 called as  cation and oxygen forms an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged to give Mn_2O_4 which written in simplest whole number ratios to give neutral MnO_2

7 0
3 years ago
In the artice, "As Sticky as a Gecko...but Ten
ra1l [238]

Answer:

The adhesive is made up of two different layers.

The lower layer is made up of vertically aligned nanotubes.

The upper layer is made up of curly, spaghetti-like, nanotubes.

6 0
2 years ago
Read 2 more answers
Hey! I was wondering how to get the solution to this question!
zzz [600]

Answer:

6.22 × 10⁻⁵

Explanation:

Step 1: Write the dissociation reaction

HC₆H₅COO ⇄ C₆H₅COO⁻ + H⁺

Step 2: Calculate the concentration of H⁺

The pH of the solution is 2.78.

pH = -log [H⁺]

[H⁺] = antilog -pH = antilog -2.78 = 1.66 × 10⁻³ M

Step 3: Calculate the molar concentration of the benzoic acid

We will use the following expression.

Ca = mass HC₆H₅COO/molar mass HC₆H₅COO × liters of solution

Ca = 0.541 g/(122.12 g/mol) × 0.100 L = 0.0443 M

Step 4: Calculate the acid dissociation constant (Ka) for benzoic acid

We will use the following expression.

Ka = [H⁺]²/Ca

Ka = (1.66 × 10⁻³)²/0.0443 = 6.22 × 10⁻⁵

3 0
3 years ago
Noble gas notation for molybdenum?
GuDViN [60]
Noble gas notation for molybdenum:
[Kr] 4d^5 5s^1
4 0
2 years ago
The diagram below represents the organizational levels of living things.
Tasya [4]

Answer: its vein

Explanation:

3 0
2 years ago
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