Respuesta :
Given :
Mass of niobium (Nb) = 237 g
To determine:
The Number of moles of niobium in the given mass
Explanation:
In chemistry, moles (n) is a unit of measurement which is given by the ratio of the mass of the substance (m) to its atomic or molar mass (M)
i.e. n = 'm' in grams/ 'M' in grams.mole⁻¹
The atomic mass of Nb = 94 g/mol
Thus,
n = 237 g/ 94 g.mol⁻¹ = 2.521 moles
Ans: Number of moles of Nb rounded off to the nearest tenth is 2.5 moles
Answer: The number of moles of given amount of niobium is 2.6 moles
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
We are given:
Given mass of niobium = 237 g
Molar mass of niobium = 93 g/mol
Putting values in above equation, we get:
[tex]\text{Moles of niobium}=\frac{237g}{93g/mol}=2.55mol[/tex]
Hence, the number of moles of given amount of niobium is 2.6 moles
