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Anastasy [175]
2 years ago
5

PLEASE HELP!!!

Chemistry
2 answers:
umka21 [38]2 years ago
7 0

Answer:

the answer is A

Explanation:

physical changes does not change the property of matter.

Serhud [2]2 years ago
5 0

Answer: A

Explanation:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity  of the substance.

According to this statement the option A that is, melting point is a physical property of matter because when a substance melts, it changes from a solid to a liquid but it still the same substance explains a specific character of a physical property

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Elabore el balance de la ecuación por oxido reducción enumerando cada paso
Rasek [7]

Answer:

{ \rm{5CaC _{2}O _{4(aq)}+ 2KMnO _{4(aq)} + 8H _{2} SO _{4(aq)}  → 5CaSO _{4(s)}+ 2Mn SO _{4(aq)}+ K _{2} SO _{4(s)} + 10CO _{2(g)}  + 8H _{2} O _{l} }}

Explanation:

This is a redox reaction formed by combining two half equations.

Check the image above, sorry if my handwriting is poor :(

8 0
2 years ago
You use 10.0 mL of solution A, 10.0 mL of solution B, and 70.0 mL of water for your first mixture. What is the initial concentra
Katena32 [7]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The  initial concentration is  C_f  =  0.0022 \  M

Explanation:

From the question we are told that

    The volume of solution A is  V_i   =  10.0 mL

    The concentration of A is C_i  =  0.0200 \ M

    The volume of solution B  is  V_B   =  10.0mL

    The volume of water is  V_{w }  =  70.0 mL

Generally the law of dilution is mathematically represented as

             C_i *  V_i = C_f *  V_f

Where  C_f is the concentration of  the mixture

            V_f is the volume of the mixture which is mathematically evaluated as

            V_f  =  10  + 10 + 70

           V_f  = 90mL

So  

      C_f  =  \frac{C_i *  V_i}{ V_f}

substituting values

       C_f  =  \frac{0.0200 *  10 }{90}

       C_f  =  0.0022 \  M

Note the mixture obtained is  KIO_3

7 0
3 years ago
Which describes the role of oxygen in photosynthesis?
Basile [38]
Photosynthesis is the process utilized in the chloroplasts of plant cells, where carbon dioxide and water undergo a chemical process with radiant energy, usually from the sun. The resulting products are energy stored in the form of a glucose molecule, and oxygen, which is given off as a waste product.
5 0
3 years ago
Read 2 more answers
One of the advantages of nylon over rayon is that nylon:
daser333 [38]
- is a natural fibre
- has low elasticity
- is wrinkle free.
3 0
2 years ago
What specifically determines how much energy is available in a molecular
HACTEHA [7]

C  The number and types of bonds within the molecule.

Explanation:

In a molecule, the number and types of bonds present determines the amount of available energy therein.

When bonds are broken or formed, energy is usually released.

  • Elements combine with one another in order to attain stability in this state.
  • Through this process, they form bonds by attraction.
  • Where atoms exchange their valence electrons by losing or gaining it, electrovalent bonds form.
  • In covalent molecules, electrons are usually shared between atoms.
  • An attraction result from this type of interaction.
  • The bond formed stores energy in the process.
  • When bonds are broken, energy is usually released. The energy accrues when the bond was being formed.
  • In molecules, we have covalent bond.

Learn more:

Bond brainly.com/question/7213980

Covalent bonds brainly.com/question/5258547

#learnwithBrainly

4 0
3 years ago
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