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Nataly [62]
3 years ago
10

True or false? To prepare 20.0 mL of 2.00 M solution of hydrochloric acid from a 10.0 M stock solution, you should take 4.00 mL

of the stock solution and add 20.0 mL of water.
Chemistry
1 answer:
Aleksandr-060686 [28]3 years ago
6 0
Sorry I don’t know but o have to answer for pionts
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You identify a molecule in a pizza that is a polymer; has oxygen, hydrogen, and sulfur atoms; and is hydrophilic. What kind of m
matrenka [14]

The kind of molecule in this pizza is a protein because it is a polymer, <u>hydrophilic</u>, and it's made up of oxygen, hydrogen, and sulfur atoms.

<h3>What is an amino acid?</h3>

An amino acid refers to a simple and organic chemical compound that consist of an acidic carboxyl group (COOH), a basic amino group (NH_2), and a unique side chain group.

<h3>What is a protein?</h3>

A protein can be defined as a <u>hydrophilic</u>, macromolecule (polymer) that is formed as a result of the union of many amino acids.

Generally, a protein contains the following chemical elements:

  • Oxygen (O) atoms
  • Hydrogen (H) atoms
  • Sulfur (S) atoms

In conclusion, the kind of molecule in this pizza is a protein because it is a polymer, <u>hydrophilic</u>, and it's made up of oxygen, hydrogen, and sulfur atoms.

Read more on protein here: brainly.com/question/19145247

4 0
2 years ago
PLZ HELP PLZ PLZ ILL MARK AS BRAINLIESTT!!!
erastova [34]

Answer:

HELP ASAP!! Evaluate the extent to which the United States government and people have reconciled social, economic, and political disparities with regards to the nation’s founding principles.

4 0
3 years ago
Read 2 more answers
Explain alley with an example​
Lostsunrise [7]

Explanation:

A narrow street or passageway between or behind city buildings. Alley is defined as a place in between something, relating to sports. An example of an alley the place on a tennis court between the sideline and service sideline. An example of an alley is the place between two outfielders on a baseball field.

hope this helps you

have a good day :)

6 0
2 years ago
which of these sentences is true about nitrogen? a- as nitrogen is the rarest gas in the atmosphere, very few organism can use i
Nataly [62]
B is true because plants can only use nitrogen in the form of nitrates, no other living thing needs nitrogen therefore the percentage of nitrogen in the atmosphere is 79%
4 0
3 years ago
Which statement best describes the formula equation cl1(g) + 2kbr(aq) —&gt; 2kcl(aq)+br2(i)
Zigmanuir [339]

Answer:

The chlorine gas and potassium bromide solution react to form liquid  bromine and potassium chloride solution.

Explanation:

Chemical equation:

Cl₂(g) + KBr (aq) → KCl (aq) + Br₂(l)

Balanced chemical equation:

Cl₂(g) + 2KBr (aq) → 2KCl (aq) + Br₂(l)

This equation showed that the chlorine gas and potassium bromide solution react to form liquid  bromine and potassium chloride solution.

Chlorine is more reactive than bromine it displace the bromine from potassium and form potassium chloride solution.

The given equation is balanced and completely hold the law of conservation of mass.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

8 0
3 years ago
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