<span>STP
signifies standard temperature and pressure. This conditions are at 1
atmospheric pressure and 0 degrees Celsius. It has been said that at these
conditions, one mole of a gas molecule is equivalent to 22.4 liters of volume.
Therefore, the correct answer is option B. </span>
Answer:
Protons = 11
Electrons = 10
Neutrons = 12
Explanation:
The atomic number of an element is the number of protons present in the nucleus of an atom of that element. A neutral atom of an element contains equal number of protons and electrons, therefore, the atomic number is also the electron number for a neutral atom.
The mass number is the sum of proton and neutrons in the nucleus of an atom of an element.
The atomic number of sodium-23, Na-23 is 11 while the mass number is 23.
An atom of sodium that has a net charge of +1 has lost an electron. Therefore, from the above information, the number of protons, neutrons and electrons present in this atom of sodium-23 is as follows:
Protons = 11
Electrons = 11 - 1
Electrons = 10
Neutrons = 23 - 11
Neutrons = 12
We see from the balanced equation that there is only 1
mole to 1 mole ratio.
Calculate moles of AgNO3:
moles AgNO3 = 0.2503 M * 0.02022 L = 0.00506 mol
This is equal to moles of NaCl,
moles NaCl = 0.00506 mol
So the concentration is:
<span>Concentration = 0.00506 mol / 0.015 L = 0.3374 M</span>
False
Enumerate means to mention a number of things or one by one