Answer: 
Explanation:
Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.
A more reactive element is one which can easily lose or gain electrons as compared to the other element.
As Magnesium is more reactive than tin, it can easily displace tin from its salt solution 
and form magnesium chloride and tin in elemental form.
The balanced chemical equation is:
Answer:
6. this is because atomic mass 11 - atomic number 5 is equal to 6 neutrons.
Answer:
If hydrochloric acid is a polar covalent compound, explain why in aqueous solution it conducts current similarly to an ionic compound.
This occurs because the current is transmitted by the charges of its atoms.
Explanation:
Hydrochloric acid is a compound that is made up of atoms with partial charges, which means that it is a polar molecule. H atoms have a positive partial charge, while Cl atoms have a negative charge, making the molecule as a whole have a neutral charge.
Being a dipole compound, water can dissolve molecules of this type, separate anions and cations. When atoms are separated from these molecules they release ions. In the case of HCl, being an acid, H+ and Cl- ions are released. This separation of charges causes electric current to be conducted.
Answer:
n = 0.072 mol
Explanation:
Given data:
Volume of gas = 3.80 L
Temperature of gas = 320 K
Pressure of gas = 0.496 atm
Number of moles of Ar gas = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will put the values.
n = PV/RT
n = 0.496 atm ×3.80 L / 0.0821 atm.L/ mol.K × 320 K
n = 1.88 /26.27 /mol
n = 0.072 mol
