The correct answer is option A, that is, the mass of the solute.
Before, preparing the solution, the laboratory technician needs to measure the mass of the solute. In the given question, the molarity of NaOH is given, the volume of the solution is given, the molar mass of NaOH is 40 g/mol.
As one knows the molarity of the solute, the volume of the solution, and the molar mass of the solute, thus, there is a need to determine only the mass of the solute prior of preparing the solution.
Answer:
Explanation:
Information given about the element:
Number of protons = 74
Number of neutrons = 110
For the atomic number:
Neutral atoms such as this one would have their atomic number to be the same with their number of electrons and protons:
atomic number = number of protons = number of electrons
The atomic number would therefore be 74
For the mass number:
The mass of an atom is centrally concentrated within the tiny nucleus. The mass number is the sum of protons and neutrons in an atom. Protons and neutrons are nuclear particles and are called nucleons:
Mass number = number of protons + number of neutrons = 74+110=184
Is this a new element?
From the peroidic table, tungsten(W) perfectly fits this description of the atom. It has an atomic number of 74 and a mass number of approximately 184. The element is not a new element.
Is it solid, liquid, or gas?
The element is a hard metallic solid. It is a classified as a transition metal on the periodic table. Transition metals have very unique metals and are mostly solids.
It’s either a or b, but I’m not sure which one it really is, but I hoped I helped a little /:).
Answer:
It will strengthen Electromagnetism