Answer:
60.9 metric tons of Mn are accumulated
Explanation:
The Mn accumulates at a rate of 0.06 mgm⁻²day⁻¹.
After 5.0years (5years * 365 = 1825days) will be accumulate:
0.06 mgm⁻²day⁻¹ * 1825 days =
109.5mgm⁻²
Now, 556km² are:
556 km² * ((1000m)² / 1km) = 5.56x10⁸ m²
In 5.56x10⁸ m² you will accumulate:
5.56x10⁸ m² * 109.5mgm⁻² = 6.09x10¹⁰mg are accumulated.
In kg:
6.09x10¹⁰mg * (1kg / 1x10⁶mg) = 6.09x10⁴kg.
In metric tons:
6.09x10⁴kg * (1 metric ton / 1000kg) =
<h3>60.9 metric tons of Mn are accumulated</h3>
Answer:
4084.808 grams (SigFigs: 4085 grams)
Explanation:
The molar mass of Iron fluoride is 112.84 g/mol.
To calculate the mass, multiply the molar mass by the number of moles.
36.2 mol * 112.84 g/mol = 4084.808 g
Convert to Sigfigs (if necessary):
4085 g
The correct answer is A. It shows how electrons are distributed in the shells of an iron atom.
Explanation:
In the model described, the circles represent the orbitals or shells of the atom, while the dots represent the distribution of electrons (negatively charged sub-particles). Additionally, the description shows the general electronic configuration of this atom is 2, 8, 14, 2, which means in the first orbital there are two electrons, in the second there are eight electrons, in the third, there are fourteenth electrons and in the fifth orbital there are two electrons. This electronic configuration occurs in the atoms of iron. Also, this differs from Cobalt because in cobalt the third orbital has 15 electrons. Thus, the model "shows how electrons are distributed in the shells of an iron atom".
There are<u> </u><u>11.5 moles</u> of potassium contained in 449 g fundamental units of potassium. therefore,
option B is correct.
A mole is the mass of a substance made up of the same number of fundamental components. Atoms in a 12-gram example are identical to 12C. Depending on the substance, the fundamental units may be molecules, atoms, or formula units.
Atomic weight 39.1 is assigned to potassium (chemical symbol K).
K content in a 449g sample is equal to
=given weight / atomic weight
=449/39.1
= 11.5mol.
A 449g sample has 11.5 moles of potassium.
Learn more about fundamental units here-
brainly.com/question/13435862
#SPJ4