Answer:
B) 12.5L
Explanation:
-We apply the mixed Gas Law:
Where:
is the given pressure of the gas
is the volume of the gas
is the number of moles of the gas
is the ideal gas constant and temperature respectively.
#We make V the subject of the formula and substitute to solve for it;
Hence, the volume of the gas is 12.5 L
The answer is "thermal energy."
Answer:
the mass of the object
Explanation: i dont really no
149 g of cobalt are present in 1.52 x atoms of cobalt.
<u>Explanation</u>:
One mole of an atom is equal to the Avagadro number of the atom.
The number of atoms per mol is divided by the given atoms of Cobalt.
=
= 2.52 mol of Co
To covert, the moles into grams multiply the mole value by its molar mass
The Molar mass of Cobalt is 58.93
= 2.52 58.93
= 149 g.
Answer:
1.12 moles of potassium
6.76x10²³ atoms of potassium
Explanation:
In order to <u>convert g of potassium to moles</u>, we need to use its <em>molar mass </em>(which we can find via the periodic table):
- Molar Mass of K = 39.09 g/mol
- 43.9 g K ÷ 39.09 g/mol = 1.12 mol K
Then, to <u>convert moles into atoms</u>, we use <em>Avogadro's number </em>(6.023x10²³ atoms per mole):
- 1.12 mol K * 6.023x10²³ = 6.76x10²³ K atoms