Answer:
Mg(ClO₃)₂ ⟶ MgCl₂ + 3O₂
Explanation:
The reaction gives magnesium chloride and oxygen.
The balanced equation is then
Mg(ClO₃)₂ ⟶ MgCl₂ + 3O₂
A is <em>wrong</em>, because it is not balanced (12 O atoms on left and 6 O atoms on right).
C and D are <em>wrong</em> because they have the reactants as products and vice versa.
Post the answer choices please. So we can help you answer the question
D sodium
I just learned this in my class today;)
Answer:
k = 6.31 x 10⁻³ min⁻¹
Explanation:
The equation required to solve this question is:
k = 0693 / t half-life
This equation is derived from the the equation from the radioctive first order reactions:
ln At/A₀ = -kt
where At is the number of isoopes after a time t , and A₀ is the number of of isotopes initially. The half-life is when the number of isotopes has decayed by a half, so
ln(1/2) = -kt half-life
-0.693 = - k t half-life
t half-life = 109.8 min
⇒ k = 0.693 / t half-life = 0.693 / 109.8 min = 6.31 x 10⁻³ min⁻¹
