Answer:
<h3>The answer is 0.25 moles</h3>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>0.25 moles</h3>
Hope this helps you
Answer:
3.937 x 10⁻⁸ inches
Explanation:
Data Given:
Atomic radium in pm (picometer) = 1.00 x 10² pm
Atomic radium in inches = ?
1 pm = 10⁻¹² m
Solution:
First convert picometer to meter
As we Know
1 pm = 10⁻¹² m
then
1.00 x 10² pm = X meter
Do cross multiplication
X meter = (1.00 x 10² pm)(10⁻¹² m) / 1 pm
X meter = 1 x 10⁻⁹ m
So, 1.00 x 10² pm equal to 1 x 10⁻⁹ m
Now convert meter to inches
As
1 m = 39.37 inches
1 x 10⁻⁹ m = X inches
Do cross multiplication
X inches = (39.3701 inches)(1 x 10⁻⁹ m ) / 1 m
X inches = 3.937 x 10⁻⁸ inches
So,
1.00 x 10² pm = 3.937 x 10⁻⁸ inches
so the radius is 3.937 x 10⁻⁸ inches
Li2O + H2O → 2LiOH
This is the answer
3rd blank write 2
Plutonium is super dangerous Basically, our buddy Pu is used to make atomic bombs and generate nuclear power. Further, it's extremely toxic due to its radioactivity.
Answer:
Age ≅ 7500 years
Explanation:
All radioactive decay is 1st order kinetics and described by the expression
A = A₀e^-kt => t = ln(A/A₀) / -k
k = 0.693 / t(half life) = (0.693 / 5730)yrs⁻¹ = 1.21 x 10⁻⁴ yrs⁻¹
t = Age = [ln(0.103/0.255) / - 1.21 x 10⁻⁴] yrs = 7500 years
