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hichkok12 [17]
2 years ago
13

Match the scientist with their achievement:

Chemistry
1 answer:
Tju [1.3M]2 years ago
5 0

Answer:

<u>Frederich Miescher</u>- first person to isolate DNA and RNA

<u>Frederick Griffith</u>- first to demonstrate horizontal transmission of dna using bacteria

<u>Gregor Mendel</u>- documented and demonstrated inheritance patterns

Thomas Hunt Morgan- identified chromosomes as the structures responsible for inheritance

<u>Joachim Hammerling</u>- demonstrated that the hereditary information of of eukaryotes is contained within the nucleus

<u>Alfred Hershey and Martha Chase</u>- demonstrated that dna not protein was the molecule responsible for hereditary

<u>George Beadle and Edward Tatum</u>- used mutants to show the relationship between DNA and proteins

<u>Albrecht Kossel</u>- characterized the structure of adenine, guanine, cytosine, thymine, and uracil

Explanation:

Hope this helps! Pls give brainliest!

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Caustic soda, NaOH, can be prepared commercially by the reaction of Na2CO3 with slaked lime, Ca(OH)2. How many grams of NaOH can
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Hey i dont have an answer but i need the points for finals today. Thank you
8 0
3 years ago
The molecular mass of air, at standard pressure and temperature, is approximately 28.97 g/mol. Calculate the mass of 3.33 moles
hoa [83]
Note: You are calculating mass which is determine the gram(g)
You will have to cancel out the mol
(28.97 g/mol) * mol will give grams by itself
Given the mass 3.33 moles of air
28.97 g/mol * 3.33 mol = 96.47 grams
Solution: 96.5 grams
5 0
3 years ago
Give two reasons why a luminous flame is not used for heating purposes. (2mks) a​
Natali [406]

Answer:

The Two reasons are :-

1. Combustion efficiency

2. Standardization of test conditions as non-luminous flame.

Explanation:

A luminous flame isn't suitable for heating as it gives out soot (A black powdery or flaky substance consisting largely of amorphous carbon, produced by the incomplete burning of organic matter)

8 0
3 years ago
Predict the sign for AS for each of the following systems: Water freezing Water evaporating Crystalline urea dissolving Assembly
djyliett [7]

Answer:  1.  Water freezing : \Delta S is -ve.

2. Water evaporating : \Delta S is +ve.

3. Crystalline urea dissolving : \Delta S is +ve.

4. Assembly of the plasma membrane from individual lipids: \Delta S is -ve.

5.  Assembly of a protein from individual amino acids: \Delta S is -ve.

Explanation:

Entropy is defined as the measurement of degree of randomness in a system.

It is represented by symbol S and we can only measure a change in entropy which is given by \Delta S.

If there is decrease in randomness , the sign for \Delta S is -ve and If there is increase in randomness , the sign for \Delta S is +ve.

1.  Water freezing: Entropy decreases as we move from liquid state to  to solid state and thus \Delta S is -ve.

2. Water evaporating : Entropy increases as we move from liquid state to  gaseous state and thus \Delta S is +ve.

3. Crystalline urea dissolving : The molecules convert from solid and ordered state to aqueous phase and random state. Thus the entropy increases and thus \Delta S is +ve.

4. Assembly of the plasma membrane from individual lipids:  random lipids are associating to form a single large polymer and thus entropy decreases and thus \Delta S is -ve.

5. Assembly of a protein from individual amino acids: random amino acids are associating to form a single large polymer and thus entropy decreases and thus \Delta S is -ve.

5 0
3 years ago
The specific heat of water is 4.18 j/(g⋅∘c). calculate the molar heat capacity of water. express your answer to three significan
iogann1982 [59]
Specific heat capacity of any substance comes with the unit : J/(g*degree C)
for molar capacity , change gram -> moles  unit ( J / moles * degree C)

4.18 J  / mol - degree C

H = 1.01 g * 2 =   2.02 g
O = 16 g

2.02 + 16  =  18.02  g

Now  :-    4.18  J / mol- degree C) *  18.02 /  1 mole H2O
molar heat  =  75.3 J / mol - degree C



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5 0
3 years ago
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