It depends on the direction of the arrow.
If the arrow goes like this ---> the reactant would be 2Fe2O3
If the arrow goes like this <--- the reactants would be 4Fe + 3O2
Answer: the answer is hydrogen
Answer:
0.0125mol/dm³
Explanation:
Given parameters:
Mass of carbon dioxide = 0.22g
Volume of water = 400cm³
Unknown:
Concentration in mol/dm³ = ?
Solution:
Concentration is the amount of solute dissolved in a solvent.
The formula is expressed as;
Concentration =
Number of moles =
Molar mass of CO₂ = 12 + 3(16) = 44g/mol
Number of moles = = 0.0005mol
Now,
1000cm³ = 1dm³
400cm³ = = 0.4dm³
Insert the parameters and solve;
Concentration = = 0.0125mol/dm³
The kinetic energy of the ball b is 12.3kJ and ball B to a is 14.2kj
Answer:
Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.
Elements: Argon