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)
Answer:
2nd energy level
if u think my ans is wrong change it ty
Reaction equation:
Zn + 2HCl → ZnCl₂ + H₂
One mole of gas occupies 22.4 L at STP
Moles of H₂ = 112/22.4
= 5 moles
The theoretical amount of Zn needed is 5 mol
The actual amount = 5/0.85
= 5.88 moles
mass = moles x Mr
mass = 5.88 x 65
mass = 382.2 g
The answer is D.
The degree of compactness of a substance