Answer:
Single celled organism
Explanation:
They fall under two categories:
Eukaryotes and prokaryotes.
Eukaryotes: Evolved from prokaryotes, they are larger and more complex. Unlike prokaryotes, they have a nucleus. Can be single celled or multicellular.
Prokaryotes: Oldest cell type, small and simple. They do not have a nucleus. Open unit with no compartments.
1. -Batteries, building, and used for automobiles
2. Some examples of Alternative energies are solar, wind, hydropower and biomass
3. Allied Waste industries, Inc.(Biomass) Human Innovations L.L.C(solar), Scotland Soil & Water Conservation District(hydropower)
The question is incomplete, here is the complete question:
Calculate the pH of a solution prepared by dissolving 0.370 mol of formic acid (HCO₂H) and 0.230 mol of sodium formate (NaCO₂H) in water sufficient to yield 1.00 L of solution. The Ka of formic acid is 1.77 × 10⁻⁴
a) 2.099
b) 10.463
c) 3.546
d) 2.307
e) 3.952
<u>Answer:</u> The pH of the solution is 3.546
<u>Explanation:</u>
We are given:
Moles of formic acid = 0.370 moles
Moles of sodium formate = 0.230 moles
Volume of solution = 1 L
To calculate the molarity of solution, we use the equation:
To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:
= negative logarithm of acid dissociation constant of formic acid = 3.75
pH = ?
Putting values in above equation, we get:
Hence, the pH of the solution is 3.546
Answer:
Empirical formula is C₄H₈O
Explanation:
Empirical formula:
It is the simplest formula gives the ratio of atoms of different elements in small whole number
Given data:
Mass of compound = 5.80 g
Mass of CO₂ = 14.2 g
Mass of water = 5.80 g
Empirical formula = ?
Solution:
Percentage of H = 5.80 / 5.80× 2/18 ×100= 11%
Percentage of C = 14.2 /5.8 ×12/44 × 100= 67%
Percentage of O = 100 -( 67+11) = 22%
Number of gram atoms:
Number of gram atoms of H = 11 / 1 = 11
Number of gram atoms of O = 22 / 16 = 1.4
Number of gram atoms of C = 67 / 12 = 5.6
Atomic ratio:
C : H : O
5.6/1.4 : 11/1.4 : 1.4/1.4
4 : 8 : 1
C : H : O = 4 : 8 : 1
Empirical formula is C₄H₈O.