Option 4. ratio of electrons to protons
Isotope that has atomic number of 82 is stable. An element that has an atomic number ∠82 more stable except Tc and Pm. Also there is the concept that isotopes consisting a combination of even-even,even-odd,odd-even, and odd-odd are all stable. Many isotopes with no magic numbers of nucleons are stable
The <span>henderson-hasselbalck equation is this
pH = pK + log [salt]/[acid]
We are given with
pH = 4.00
</span><span>1.50 l of 0.0200 m solution of benzoic acid
The pK for benzoic acid is
4.20
Solving for the moles of salt,
4 = 4.2 + log 1.5(0.02)/n
n = 71.62 moles
The mass is
m = 71.62 (249.2)
m = 17800 grams</span>
Answer:
6.05 × 10⁴ cal
Explanation:
Step 1: Given and required data
Mass of water (m): 112 g
Enthalpy of vaporization of water (ΔHvap): 540 cal/g
Step 2: Calculate how much energy is required to vaporize 112 g of water
Vaporization is a physical change in which a substance goes from the liquid state to the gaseous state. We can calculate the energy required (Q) using the following expression.
Q = ΔHvap × m
Q = 540 cal/g × 112 g = 6.05 × 10⁴ cal
Answer:
The answer is C. Gas particles have no attractive forces between them.
Explanation:
Answer:
A type of granite?
Explanation:
The photo is a bit hard to see, but I'm guessing, from its smooth edges and the streaky colours that its a type of granite?
Looks like the type of granite used on granite tabletops....
I might be wrong, it's just a guess!
Hope this helped in some way....
Bluey :)