Scandium Z= 21 has an electronic configuration of 1s²2s²2p⁶3s²3p⁶3d¹4s².
This shows that Scandium has 21 electrons with three outermost or valency electrons. It is a d-block elements whose valence electrons are equal to their group number, which is equal to the number of electrons in the valence shell.
I think it’s a an oxidation reduction reaction because Aluminum is oxidized oxygen is reduced. What are the elemental oxidation states in Al2O3 ?
Answer : The energy gained by copper can be calculated by using the below formula :
Energy = Mass X Specific heat X Temperature change.
Solution : Given, Mass of Cu = 48.7
Specific heat = 0.385
Temperature change = 10 to x = (x-10)
On substituting the values we get,
Energy = 48.7 X 0.385 X (x-10) = 18.7495 X (x-10) KJ
Answer:
11.0 L
Explanation:
The equation for this reaction is given as;
2H2 + O2 --> 2H2O
2 mol of H2 reacts with 1 mol of O2 to form 2 mol of H2O
At STP;
1 mol = 22.4 L
This means;
44.8 L of H2 reacts with 22.4 L of O2 to form 44.8 L of H2O
In this reaction, the limiting reactant is H2 as O2 is in excess.
The relationship between H2 and H2O;
44.8 L = 44.8 L
11.0 L would produce x
Solving for x;
x = 11 * 44.8 / 44.8
x = 11.0 L