The average atomic mass of oxygen is the atomic mass with respect to 1/12th the mass of a C-12 atom, related to natural abundance.
amu - atomic mass units
O-16 - 15.995 amu
O-17 - 16.999 amu
O-18 - 17.999 amu
the average atomic mass is 15.9994 amu
average atomic mass = ∑atomic mass of each isotope * relative abundance percentage
in other words the average atomic mass is closer to the atomic mass of the most abundant isotope. In this case 15.9994 is closest to 15.995 amu which is the atomic mass of O-16.
This means that O-16 is the most abundant isotope.
The answer is D: Saturated.
A saturated solution is one in which the exact maximum amount of solute has been dissolved. So, new solute will not dissolve in the solution. In contrast, an unsaturated solution can hold more solute, so if that option were correct, the crystal would have dissolved.
The other two terms are a bit more complicated. A supersaturated solution is one holding an amount of solute above the sustainable limit. Because of that, when more solute is added, the solution will immediately adjust, and some solute will come out of solution in a precipitate. Because the crystal isn't growing, we can eliminate this option.
A concentrated solution is one holding a relatively large amount of solute. However, you can have concentrated solutions that are saturated and unconcentrated (the word for this is dilute) solutions that aren't saturated. Therefore, we can say that because the crystal doesn't dissolve, this solution is saturated, but we can't say with certainty that it is concentrated.
Because the first three options are invalid, as described above, while the scenario does describe a saturated solution, D is the correct answer.
Answer:
3.27 minutes
Explanation:
To solve this problem we will first convert miles/hour to km/min. For this purpose we will require following reference conversions as;
1 Mile = 1.60934 Km
And,
1 Hour = 60 min
Therefore,
As,
1 Mile = 1.60934 Km
Then,
74 Miles = X Km
Solving for X,
X = 74 miles × 1.60934 Km ÷ 1 mile
X = 119.10 Km
Therefore,
119.10 Km were travelled in = 60 min
So,
6.50 Km will be travelled in = X min
Solving for X,
X = 60 min × 6.50 Km ÷ 119.10 Km
X = 3.27 minutes
Answer:
Your question is missing some information.
But in most of the systems, potential energy and kinetic energy are inversely proportional
Al+3is the third electron ionization level of the atom Al.
Al has an atomic number of 13, thus it has 13 protons and electrons.
By shooting a photon with a certain amount of energy (the energy in kj/mol) the atom will be ionized and lose the electrons.
13-3 = 10
The total amount of electrons in Al3+ is 10 <span>*The energy required to ''detach'' 3 electrons from the 3s and 3p orbital.</span>
