Answer:
e) halogens
Explanation:
Halogens -
It is the group of elements present in the group 17 of the periodic table .
Oxidizing agent -
It is the process by which the process of oxidation takes place ,
It is the tendency of an element to oxidize other element by accepting electrons and reducing itself .
In the electrochemical series ,
Halogens are placed on the top of the series , and hence have the capability to act as a very good oxidizing agent , as they can easily accept electrons other elements and reduce themselves and thereby by oxidizing the other element .
Answer:
The pressure of the gas is kept constant. If the Kelvin temperature of the gas is doubled, the volume of the gas is. O 1.
Answer:
The density of air goes down as you get higher with altitude.
Explanation:
Less air is pushing down on the molecules below it as you go up. This means that it is not as compacted, another word for which is dense.
Answer:
8.9x10¹⁷ atoms of Al are present
Explanation:
To find the number of atoms from the mass of an atom we must convert, as first, the mass to moles using the molar mass of the atom (26.98g/mol For Aluminium).
Then, we must convert the moles to atoms knowing that 1mol = 6.022x10²³ atoms.
<em>Moles Aluminium:</em>
4.0x10⁻⁵g * (1mol / 26.98g) = 1.483x10⁻⁶ moles Al
<em>atoms:</em>
1.483x10⁻⁶ moles Al * (6.022x10²³ atoms / mol) =
<h3>8.9x10¹⁷ atoms of Al are present</h3>