How many moles are there in 237 g of niobium? Round to the nearest tenth. Don't forget the units.

Question

asked Dec 13, 2019 136k views

2 Answers

Ndoogan · Answer 1 · 2019-12-16T00:35:09+0000

Answer: The number of moles of given amount of niobium is 2.6 moles

Step-by-step explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

We are given:

Given mass of niobium = 237 g

Molar mass of niobium = 93 g/mol

Putting values in above equation, we get:

$\text{Moles of niobium}=(237g)/(93g/mol)=2.55mol$

Hence, the number of moles of given amount of niobium is 2.6 moles

Beltran · Answer 2 · 2019-12-18T11:07:10+0000

Given :

Mass of niobium (Nb) = 237 g

To determine:

The Number of moles of niobium in the given mass

Step-by-step 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