Balanced equation will be as follows
2NaOH + H2SO4=Na2SO4 + 2H2O
from MaVa/MbVb=Na/Nb where Ma is molarity of acid=?
Va is volume of acid=25.0 mL
Mb is molarity of base= 0.05 M
Vb is volume of base=18.3 mL
Nb number of moles of base= 2
Na is number of moles of acid =1
Ma*25 mL / 18.3mL*0.05M = 1/2
Ma=18.3*0.05M / 50 = 0.0183M
The molarity of sulphuric acid = 0.0183M
I think it is A but idk for sure HOPE THIS HELPES :)
As one moves across a period, from left to right, both the number of protons and electrons of a neutral atom increase. The enhancing number of electrons and protons results in a greater attraction between the electrons and the nucleus. This uplifted attraction pulls the electrons nearer to the nucleus, therefore, reducing the size of the atom.
On the other hand, while moving down a group, there is an increase in the number of energy levels. The enhanced number of energy levels increases the size of the atom in spite of the elevation in the number of protons. In the outermost energy levels, the protons get attracted towards the nucleus, however, the attraction is less due to an increase in the distance from the nucleus.
A binary compound is ionic, therefore it could not be A. The answer is aluminium fluoride (D). <span />
<h3><u>Answer;</u></h3>
B) a system is a group of objects analyzed as one unit
C) energy they moves across system boundaries is conserved
<h3><u>Explanation;</u></h3>
- System is a group of objects analyzed as one unit
.
- An open system is a system that freely exchanges energy and matter with its surroundings.
- A closed system is a system that exchanges only energy with its surroundings, not matter. An isolated system does not exchange energy or matter with its surroundings.
