A chemist measures the amount of nitrogen gas produced during an experiment. She finds that of nitrogen gas is produced. Calculate the number of moles of nitrogen gas produced. Be sure your answer has the correct number of significant digits.

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A chemist measures the amount of nitrogen gas produced during an experiment. She finds that of 282. g of nitrogen gas is produced. Calculate the number of moles of nitrogen gas produced. Be sure your answer has the correct number of significant digits.

The number of moles of nitrogen gas produced are 10.07 moles

Explanation:

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

We are given:

Given mass of nitrogen gas = 282 g

Molar mass of nitrogen gas = 28 g/mol

Putting values in above equation, we get:

Hence, the number of moles of nitrogen gas produced are 10.07 moles

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3