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Mariulka [41]
3 years ago
7

Which of the following is the best definition of convection?

Chemistry
2 answers:
lara [203]3 years ago
7 0
<span>a) movement of heat through space </span>
OLEGan [10]3 years ago
7 0
A is correct.
Please mark as brainliest, thanks.
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Which sample contains more atoms: 3.89 g of nickel or 6.61 g of silver? defend your answer
Lubov Fominskaja [6]

Nickel contains more atoms.

<u>Explanation:</u>

Number of atoms is determined by the Avogadro number.

1 mole of substance contains 6.022 X 10²³ atoms.

Given:

Mass of Nickel, Ni = 3.89g

Molecular weight of Ni = 58.6934g

Number of moles of Ni = 3.89/58.6934g

Number of atoms of Ni = \frac{3.89 X 6.022 X 10^2^3}{58.6934}

Number of atoms of Ni = 0.39 X 10²³

Mass of silver, Ag = 6.61g

Molecular weight of Ag = 107.8682g

Number of moles of Ag = 6.61/107.8682

Number of atoms of Ag = \frac{6.61 X 6.022 X 10^2^3}{107.8682}

Number of atoms of Ag = 0.36 X 10²³

Therefore, Nickel contains for atoms.

4 0
3 years ago
What occurs when energy is removed from a liquid-vapor system in equilibrium
yulyashka [42]

<span>The answer is that the number of water molecules  increases and that of vapor decreases.  When energy is removed from the system it would do so mostly as heat. Therefore the energy in the system would decrease and the molecules would vibrate at lower energies. Therefore, several water vapor molecules would turn back to water.  </span>






4 0
3 years ago
How many atoms are there in 4 moles of table sugar ?
Likurg_2 [28]

Answer: 2.408×10^24 atoms

Explanation:

Applying the formula

No. moles= (no. Of atoms)/Avogadro's number

4 = n/6.02×10^23

no. of atoms= 2.408×10^24 atoms

7 0
3 years ago
A student following the reaction seen here calculated a theoretical yield of 38.3g C₆H₅Cl but when he did the experiment in the
Reil [10]

Answer:

96.1 %

Explanation:

Which teacher do you have lol

7 0
3 years ago
HELP ME OUT PLEASE!!!!!!!!
34kurt

Answer:

49.979

Explanation:

4 0
2 years ago
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