At a fixed temperature and pressure, a cylinder contains equal volumes of O2 and an unknown gas. The identity of the unknown gas CO.
The number of moles of a given substance is calculated by dividing the mass by the molar mass.
The number of moles of O₂ = 
= 0.625 moles.
Based on the given assumption, at fixed temperature and pressure;
- Let assume that the number of moles of the unknown gas is = 0.625 moles
The molar mass of the unknown gas can be estimated as:
= 28 g/mol
Therefore, we can conclude that the unknown gas is CO.
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Answer:
The density of a potato is 
Explanation:
Given that,
A potato that is too large to fit into a graduated cylinder.
Let us consider the mass of potato is M and volume of entire potato is V'.
The volume of water is V.
We know that,
Density :
The density is equal to the mass divided by volume.
In mathematically,
Where, m = mass
V = volume
We need to calculate the volume of potato
Using formula for volume
Where, V' = volume of potato
V''=Volume of combine water and potato
V = volume of water
We need to determine the density of a potato
Using formula of density
Put the value into the formula
Hence, The density of a potato is
The answer is a compound because it is only a compound that can be broken to elements. for eg. H2o is a compound and be broken to element of 2 molecules of hydrogen and oxygen
Osmosis deals only with D. Water. Diffusion and Osmosis are relatively the same thing besides the fact that water is largely incorporated with the osmosis.
