Answer:
Explanation:
57.1 g of oxygen combines with 42.9 g of carbon
57.1/16 atoms of oxygen combines with 42.9 / 12 atoms of carbon
3.56 atoms of oxygen combines with 3.575 atoms of carbon
one atom of oxygen combines with one atom of carbon
A appears to be CO ( carbon monoxide gas )
2 )
72.7 g of oxygen combines with 27.3 g of carbon
72.7 / 16 atoms of oxygen combines with 27.3 / 12 atoms of carbon
4.54 atoms of oxygen combines with 2.275 atoms of carbon
2 atoms of oxygen combines with 1 atom of carbon
B appears to be CO₂ ( Carbon dioxide)
Atoms form molecules. A molecule is a chemical structure consisting of at least two atoms held together by one or more chemical bonds. ... All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms.
Answer:
Explanation:
2 HgCl₂ + C₂O₄²⁻ = 2 Cl⁻ + Hg₂Cl₂ + 2CO₂
1 )
Rate of reaction
[HgCl₂] [C₂O₄²⁻ ] Rate
1 . .124 .115 1.61 x 10⁻⁵
2 . .248 .115 3.23 x 10⁻⁵
3 . .124 .229 6.4 x 10⁻⁵
4 . .248 .229 1.28 x 10⁻⁴
comparing 1 and 3 , when concentration of HgCl₂ remains constant and concentration of C₂O₄²⁻ becomes twice , rate becomes 4 times so rate is proportional to square of concentration of C₂O₄²⁻ .
Hence n = 2
comparing 1 and 2 , when concentration of HgCl₂ becomes twice and concentration of C₂O₄²⁻ remains constant , rate becomes 2 times so rate is proportional to simply concentration of C₂O₄²⁻ .
Hence m = 1
Putting the data of 1 in the rate equation found
1.61 x 10⁻⁵ = k x .124 x .115²
k = 11.3 x 10⁻⁴ M⁻² s⁻¹
Answer:
The mole fraction of benzene if 0.43
Explanation:
Let's apply the colligative property of vapor pressure lowering.
P° - Ps = P° . Xm
Where P° is vapor pressure of pure solvent
Ps is vapor pressure of solution
Xm is mole fraction of solute
Determine the solute and the solvent:
Solute: Toluene
Solvent: Benzene (Vapor pressure of pure bencene at 20°C, is 74.7Torr)
74.7 Torr - 32 Torr = 74.7 Torr . Xm
42.7 Torr / 74.7 Torr = 0.57 → Xm
Sum of mole fraction = 1
Mole fraction of bencene + Mole fraction of toluene = 1
Mole fraction of bencene + 0.57 = 1 ⇒ 1 - 0.57 = 0.43
Answer:
The gills release carbon dioxide into the water.
The gills take in oxygen from the water.
Explanation:
It's legit breathing.