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2 years ago

Which best describes the difference between radiation and conduction? (1 point)

Chemistry

1 answer:

NNADVOKAT [17]2 years ago

6 0

Answer:

B) Conduction requires two objects to be in physical contact.

Explanation:

Conduction is when two objects are directly touching each other. So, the objects must come in physical contact with each other.

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Which statement correctly compares the masses of subatomic particles in an atom such as carbon?

iogann1982 [59]

Answer:

C- A proton has about the same mass as a neutron .

Explanation:

In an atom such as a carbon atom, the masses of the proton and neutrons are the same.

The mass of the electrons is very negligible.

Protons are the positively charged particles in an atom
Neutrons do not carry any charges
Both protons and neutrons have similar masses.
They contribute the bulk of the mass of the atom.
The electrons carry negative charges and they have negligible masses.

The mass of protons and neutrons are similar.

5 0

2 years ago

PLS HELP!!! WILL GIVE BRAINLIEST!!! Really easy, I am just horrible at this stuff.

otez555 [7]

Answer:

B: Igneous, C: Metamorphic, D: Sedimentary

Explanation:

Sorry, i dont know A

6 0

3 years ago

Read 2 more answers

Why does the Moon orbit Earth instead of the Sun?

Vera_Pavlovna [14]

Gravity depends on distance and the moon is closer to earth

4 0

2 years ago

Subject: Chemistry<br><br><br>whoever does this right will give the brainliest <3)

Andru [333]

Answer:

1 A

3 main types of bond are

Ionic bond ( formed due to complete transfer of electron between atoms(

Covalent bond ( formed by mutual sharing of electron)

Metalic bond ( present in the metals due to mobile electrons)

1 B bond in CaO is ionic bond formation in attached image

1 C hydrogen bond with nitrogen is covelent NH3 ammonia is formed because a bond between two non metals is expected to be covalent

More their electronegativity difference between hydrogen and nitrogen is less than 1.7 that makes it covalent

Explanation:

4 0

2 years ago

Read 2 more answers

Commercial cold packs often contain solid NH4NO3 and a pouch of water. The temperature of the pack drops as the NH4NO3 dissolves

Yanka [14]

Answer: b. $\Delta H_{soln}$ is positive and $\Delta S_{soln}$ is positive.

Explanation:-

As the temperature of the pack drops, the energy has been absorbed from the pack for dissolution of $NH_4NO_3$ in water. Thus as the energy has been absorbed in the reaction, the reaction is endothermic and the change in enthalpy i.e. $\Delta H_{soln}$ is positive.

The entropy is the measure of degree of randomness. The entropy increases when the randomness increases and the entropy decreases when the randomness decreases. When a substance dissolves in water, it dissociate into ions and hence the randomness increases thus the change in entropy i.e. $\Delta S_{soln}$ is positive.

$NH_4NO_3\rightarrow NH_4^++NO_3^-$

7 0

2 years ago