Question

How many moles of lithium are in 25 grams of lithium

Answer 1

To find the number of moles of lithium in a 25 gram sample, divide the mass by lithium's molar mass of 6.94 g/mol, resulting in approximately 3.60 moles of lithium.

Step-by-step explanation:

To determine the number of moles of lithium in a 25 gram sample, you need to use the element's molar mass. The molar mass of lithium is 6.94 g/mol, which means that one mole of lithium weighs 6.94 grams. To find the moles, you divide the mass of lithium by its molar mass:

Number of moles = mass of lithium (g) / molar mass of lithium (g/mol)

In this case:

Number of moles = 25 g / 6.94 g/mol ≈ 3.60 moles of lithium.

This calculation shows that there are approximately 3.60 moles of lithium in a 25 gram sample.

Answer 2

Answer: 8.3 moles

Step-by-step explanation:

Number of moles of lithium = ?

Mass in grams = 25 grams

Molar mass of lithium = 3g/mol

Recall that:

Number of moles = (Mass in grams / Molar mass)

Number of moles = 25 grams / 3g/mol

= 8.3 moles

Thus, there are 8.3 moles of lithium in 25 grams of lithium