In order to balance this, you have to count each
element where the elements in the reactants side and the product side should
have equal number of molecules. The balanced reaction is as follows:
2HCl + Ca(OH)2 = CaCl2 + 2H2O
Answer:
C. I, III , IV
Explanation:
As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
As the size of atom increases the ionization energy from top to bottom also decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.
Answer:
carbon
Explanation:
The properties of carbon forms the basis for all life. Explanation: The atoms of carbon are found in the molecules of all living species.
The unit of M (molarity) is a unit of moles per liter of solution. So, the solution contains 2.0 moles of NaCl per 1 liter of solution.
0.035L
35.4mL
Explanation:
Given parameters:
Concentration of HCl = 12M
Number of moles = 0.425mol
Unknown:
volume of solution = ?
convert from L to mL = ?
Solution:
Molarity is the amount of solute in a volume of solvent
Molarity = 
since the volume is the unknown, we make the subject of formula;
Volume = 
Volume =
= 0.035L
Converting to mL gives:
1L = 1000mL
0.035L = (0.035 x 1000)mL , 35.4mL
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