Answer:
6amu
Explanation:
mass=proton+neutron
mass of cl2=2(16+16)=64amu
A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy without being used up in the reaction. After the reaction occurs, a catalyst returns to its original state and so catalysts can be used over and over again.
Answer
Two different elements have similar chemical properties when they have the same number of valence electrons in their outermost energy level. ... Elements in the same column of the Periodic Table have the same number of valence electrons – that's why they have similar chemical properties.
Here we go, 4 attachments, you made me work LOL
Answer:
a. 0,035M
Explanation:
For the reaction:
Ba(OH)₂(s) ⇄ Ba²⁺(aq) + 2OH⁻(aq)
Ksp is defined as:
Ksp = [Ba²⁺] [OH⁻]²
5x10⁻³ = [Ba²⁺] [OH⁻]²
if is added a solution of 1M of Ba²⁺:
5x10⁻³ = [1M] [OH⁻]²
The addition of barium hydroxide Ba(OH)₂ gives:
[Ba²⁺] = 1M + x
[OH⁻]² = 2x
Replacing:
5x10⁻³ = [1 + x] [2x]²
5x10⁻³ = 4x² + 4x³
Solutions are:
x = -1,00 M
x = -0,036 M
<em><u>x = 0,035 M</u></em> → Right answer, there are not negative concentrations.
Thus, solubility is
<em>a. 0,035M</em>
<em></em>
I hope it helps!
