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pochemuha
3 years ago
6

(WRITE AT LEAST 3 COMMENTS FROM YOUR MOST REACTED POST)

Chemistry
1 answer:
quester [9]3 years ago
5 0
Karma sucide and hunger
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A 23.8 mL sample of HCl of unknown concentration is neutralized by 5.45 mL of 0.331 M Ca(OH)2. What is the concentration of the
SCORPION-xisa [38]
A becuase that is the one that is also b becuase a and c
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3 years ago
Help please and thanks
Likurg_2 [28]
The first one is 2
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3 years ago
Catalysts increase reaction rates by lowering the activation energy of a reaction.
Setler [38]
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3 years ago
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Convert 4.5 X 1022 molecules of H2O to moles.
noname [10]

Answer:

<h3>The answer is 0.075 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.5 \times  {10}^{22} }{6.02 \times  {10}^{23} }  \\  = 0.074750830...

We have the final answer as

<h3>0.075 moles</h3>

Hope this helps you

3 0
3 years ago
Differentiate between the three types of simple permanent tissues on the basis of their cell walls​
True [87]

Answer:

Parenchyma is the most simple and specialized tissue which is concerned mainly with the vegetative activities of the plant. The cells are isodiametric with well-developed intercellular spaces, vacuolated cytoplasm and cellulosic cell wall.

Collenchyma is the tissue of the primary body. The cells of the tissue contain protoplasm and are living without intercellular spaces. The cell wall articulate at the corners and are made up of cellulose, hemicellulose, and pectin.

Sclerenchyma is the thick-walled cell tissue. In the beginning, the cell is living and have protoplasm, but due to deposition of impermeable secondary board lignin, they become dead thick and hard.

5 0
3 years ago
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