Question

For example, if you have 25 grams of Li (lithium), how many moles of lithium are contained in that sample?

Answer 1

To find the number of moles of lithium in a 25 gram sample, divide the mass by the molar mass of lithium (6.94 g/mol).

Step-by-step explanation:

The molar mass of lithium (Li) is 6.94 g/mol. To find the number of moles of lithium in a 25 gram sample, we can use the formula:

Number of moles = Mass / Molar mass

Substituting the values, we get:

Number of moles = 25 g / 6.94 g/mol = 3.6 mol (rounded to one decimal place)

Therefore, there are approximately 3.6 moles of lithium in a 25 gram sample.