Answer:
b
Explanation:
im pretty sure could be wrong
A. atoms because they are all matter and matter is made up of atoms
Answer:
Calcium would displace barium.
Explanation:
Ba(NO₃)₂ + Ca --> Ca(NO₃)₂ + Ba
There are two types of compounds: molecular/covalent and ionic.
Molecular/covalent compounds are non-metal + non-metal.
Ionic compounds are metal + non-metal.
Looking at the periodic table, barium is a metal. Calcium is also a metal.
Checking a polyatomic ions chart would tell you NO₃⁻ is a non-metal because it has a negative charge.
Since there is no metal + metal compound, the calcium metal would displace barium. The compound remains ionic.
Answer : The number of moles of added must be, 0.37 mol
Explanation :
The given chemical reaction is:
Initial mol. 2.99 x 0 0
At eqm. (2.99-1.30) (x-1.30) 1.30 1.30
= 1.69
The expression for equilibrium constant is:
Now put all the given values in this expression, we get:
x = 1.67 mol
The moles of added = (x-1.30) = (1.67-1.30) = 0.37 mol