How many grams of nitrogen are in 3.51 mol N?
[?] g N
Answer (2)
Multiply the number of moles of nitrogen by its molar mass.
The formula is: mass = number of moles × molar mass .
Substitute the given values: mass = 3.51 mol × 14.01 g/mol .
Calculate the mass: 49.1751 g .
Explanation
Problem Analysis We are given the number of moles of nitrogen ( N ) as 3.51 mol and the molar mass of nitrogen as 14.01 g/mol. We need to find the mass of nitrogen in grams.
Formula To find the mass of nitrogen, we can use the formula: \t mass = number of moles × molar mass
Substitution Substitute the given values into the formula: \t mass = 3.51 mol × 14.01 g/mol
Calculation Perform the calculation: \t mass = 49.1751 g
Final Answer Therefore, the mass of nitrogen in 3.51 mol N is approximately 49.18 g.
Examples
In chemistry, when you're conducting an experiment, you often need to know the mass of a substance required for a particular reaction. For example, if you need 3.51 moles of nitrogen to react with another substance, knowing how to convert moles to grams using the molar mass allows you to accurately measure out the required amount of nitrogen. This ensures the reaction proceeds as expected and helps you achieve accurate results. This calculation is fundamental in stoichiometry, which deals with the quantitative relationships between reactants and products in chemical reactions.
To find the grams of nitrogen in 3.51 mol N, multiply the number of moles by the molar mass of nitrogen (14.01 g/mol), which gives approximately 49.18 g of nitrogen. This is crucial for accurate stoichiometric calculations in chemistry.
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