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Nadusha1986 [10]
3 years ago
7

How many molecules of water are in a 500.0 grams water bottle?​

Chemistry
1 answer:
Marysya12 [62]3 years ago
3 0

Somewhere around 27-28 I believe

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A sample of gold has a mass of 38.6 grams and a volume of 2 cm3. What is the density of gold?
viva [34]
The answer is 19.3 i think..
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4 years ago
Alpha helices are a type of secondary structure in proteins. What is the length of a 27.0 kDa single‑stranded α‑helical protein
iogann1982 [59]

Answer : The  length of protein will be, 36.8 A⁰

Explanation :

First we have to calculate the amino acid residue.

\text{Amino acid residue}=\frac{\text{Length of single strand of protein}}{\text{Mean residue mass}}

Given:

Length of single strand of protein = 27.0 kDa

Mean residue mass = 110 Da

\text{Amino acid residue}=\frac{27.0kDa}{110Da}=\frac{27000Da}{110Da}=245.4

Now we have to calculate the number of turns in protein.

\text{Number of turns in protein}=\frac{\text{Amino acid residue}}{3.6\text{amino acid per turn of the alpha-helix}}

As there are 3.6 amino acid per turn of the alpha-helix.

\text{Number of turns in protein}=\frac{245.4}{3.6}=68.17

Now we have to calculate the length of the protein.

\text{Length of protein}=\text{Number of turns in protein}\times \text{Length of each turn}

As, we know that the length of each turn = 0.54 A⁰

\text{Length of protein}=68.17turns\times 0.54\AA=36.8\AA

Thus, the length of protein will be, 36.8 A⁰

8 0
3 years ago
A ____________ are large molecules made up of repeating units, referred to as monomers.
ziro4ka [17]

Answer: polymers

A polymer are large molecules made up of repeating units, referred to as monomers.

Explanation:

Polymers are macromolecule with large size and high molecular mass. They consists of several repeating units of simpler molecules known as monomers.

Examples of polymers found in plants are

- starch composed of several glucose units linked by glycosidic bonds

- cellulose composed of several repeating glucose units linked by glycosidic bonds as well

An example of polymers found in animals is

- glycogen composed of several units of glucose monomers linked by glycosidic bonds

4 0
4 years ago
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Which rays of the electromagnetic spectrum are responsible for causing sunburn when you spend too much time exposed at the beach
AlekseyPX

Answer: ultraviolet light

Explanation:

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What happens to the decaying proton during positron emission?
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Answer:

Turns into a neutron and a gamma ray and a positron are released.

Explanation:

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