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kompoz [17]
3 years ago
15

Why was the cell did covered only after the invention of the microscope

Chemistry
2 answers:
nikdorinn [45]3 years ago
6 0

They are too small to see with the naked eye

love history [14]3 years ago
6 0

Answer:

Cell cannot he seen by our naked eyes and it is also a microscopic animal.

Explanation:

So we need microscope to see cell.

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Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possibl
olya-2409 [2.1K]

Answer:

Following are the response to the given question:

Explanation:

The number of shells

n = 4

Calculating the spectral line:

= \frac{n(n-1)}{2}\\\\ = \frac{4(4-1)}{2} \\\\= \frac{4\times 3}{2}\\\\ = \frac{12}{2}\\\\ = 6

4 0
3 years ago
54
skelet666 [1.2K]

Answer:

less than 5 centimeters because it is a nonvascular plant

Explanation:

Mosses are a group of plants under the division Bryophyta. They are said to be the most primitive plant life in existence as they lack true roots, stems and leaves. They also lack vascular system, hence, they are regarded as non-vascular plants. They usually grow in very small sizes (about 0.2 - 10cm).

According to this question, Penny bought a club moss plant for her water garden and needs to know how tall the plant will grow so she know how much space it will need. Since it is a miss plant that lacks vascular tissues i.e. nonvascular, it will likely grow less than 5 centimeters in height.

7 0
2 years ago
25cc of 5 % NaOH solution neutralized 30cc of h2sO4 solution. Whatis normality of H2SO4?
MAVERICK [17]

The normality of the H₂SO₄ that reacted with 25cc of 5 % NaOH solution is 1.1 N.

<h3>What is the molarity of 5% NaOH?</h3>

The molarity of 5% NaOH is 1.32 M

25 cc of NaOH neutralized 30cc of H₂SO₄ solution.

Equation of reaction is given below:

  • 2 NaOH + H₂SO₄ ---> Na₂SO₄ + 2 H₂O

Molarity of H₂SO₄ = 1.32 x 1 x 25/(30 x 2) = 0.55 M

  • Normality = Molarity × moles of H⁺ ions per mole of acid

moles of H⁺ ions per mole of H₂SO₄ = 2

Normality of H₂SO₄ = 0.55 x 2 = 1.1 N

In conclusion, the normality of an acid is determined from the molarity and the moles of H⁺ ions per mole of acid.

Learn more about normality at: brainly.com/question/22817773

#SPJ1

7 0
1 year ago
Two liquids – one polar, one nonpolar – have the same molar mass. which one has the higher boiling point?
Anton [14]
Polar will always have the higher boiling point because they have strong van der waal forces

7 0
3 years ago
What is meant by Vulcanicity?​
scZoUnD [109]

The quality or state of being volcanic.

3 0
2 years ago
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