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dezoksy [38]
2 years ago
8

cell wall A structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum, packages

them, and distributes them to other parts of the cell. O Long, thin fibers that function in the movement and support of the cell O A double layer of phospholipids that makes up plasma and organelle membranes. O A rigid layer of nonliving material that surrounds the cells of plants and some other organisms.​
Chemistry
1 answer:
Vilka [71]2 years ago
4 0

Hello! I believe you are asking what a Cell wall Is.

Answer:

<em> A rigid layer of nonliving material that surrounds the cells of plants and some other organisms.</em>

Explanation:

A cell wall is<u><em> a sturdy outer layer of protection of the plant cell. It protects the cell membrane and other organelles from the environment, bacteria, and viruses</em></u>. It is composed of cellulose, lignin, and suberin interspersed with carbohydrates and proteins.

Hope this Helps!

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After mixing an excess PbCl2 with a fixed amount of water, it is found that the equilibrium concentration of Pb2 is
Tanzania [10]

Answer:

Ksp = 8.8x10⁻⁵

Explanation:

<em>Full question is:</em>

<em>After mixing an excess PbCl2 with a fixed amount of water, it is found that the equilibrium concentration of Pb2+ is 2.8 × 10–2 M. What is Ksp for PbCl2?</em>

<em />

When an excess of PbCl₂ is added to water, Pb²⁺ and Cl⁻ ions are produced following Ksp equilibrium:

PbCl₂(s) ⇄ Pb²⁺ + 2Cl⁻

Ksp = [Pb²⁺] [Cl⁻]²

If an excess of PbCl₂ was added, an amount of Pb²⁺ is produced (X) and twice Pb²⁺ is produced as Cl⁻ (2X):

Ksp = [X] [2X]²

Ksp = 4X³

As X is the amount of Pb²⁺ = 2.8x10⁻²M:

Ksp = 4(2.8x10⁻²)³

<h3>Ksp = 8.8x10⁻⁵</h3>
4 0
4 years ago
2AlF3 + 3K2O → 6KF + Al2O3
Agata [3.3K]
<h3>Answer:</h3>

7.4797 g AlF₃

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Stoichiometry</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN] 2AlF₃ + 3K₂O → 6KF + Al₂O₃

[Given] 15.524 g KF

<u>Step 2: Identify Conversions</u>

[RxN] 6 mol KF = 2 mol AlF₃

Molar Mass of K - 39.10 g/mol

Molar Mass of F - 19.00 g/mol

Molar Mass of Al - 26.98 g/mol

Molar Mass of KF - 39.10 + 19.00 = 58.1 g/mol

Molar Mass of AlF₃ - 26.98 + 3(19.00) = 83.98 g/mol

<u>Step 3: Stoichiometry</u>

  1. Set up:                              \displaystyle 15.524 \ g \ KF(\frac{1 \ mol \ KF}{58.1 \ g \ KF})(\frac{2 \ mol \ AlF_3}{6 \ mol \ KF})(\frac{83.98 \ g \ AlF_3}{1 \ mol \ AlF_3})
  2. Multiply/Divide:                                                                                                  \displaystyle 7.47966 \ g \ AlF_3

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 5 sig figs.</em>

7.47966 g AlF₃ ≈ 7.4797 g AlF₃

3 0
3 years ago
Think about a wooden chair and a balloo. What do these two objects always have in common
vovangra [49]
A. Both are made of atoms.
5 0
4 years ago
Read 2 more answers
Which nitrogen base sequence is the partner of C-A-T-C-G-A?
aalyn [17]

Answer:

G-T-A-G-C-T

this is the answer

7 0
3 years ago
Read 2 more answers
We love blasting our radio in the morning to wake up. Radio waves are used to transmit information on various channels. Calculat
Reil [10]

Answer:

wavelength =  0.56 × 10⁻² m

Explanation:

Given data:

Frequency of radiation = 5.4 × 10¹⁰ Hz

Wavelength = ?

Solution:

Formula:

speed of light = wavelength × frequency

wavelength = speed of light / frequency

wavelength =  3 × 10⁸ m/s / 5.4 × 10¹⁰ Hz     ( Hz= 1/s)

wavelength =  0.56 × 10⁻² m

4 0
4 years ago
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