Asample of ammonia has a mass of 82.9 g. how many molecules are in this sample?

Explanation: To calculate the moles, we use the equation:

Given mass of ammonia given = 82.9 g

Molar mass of ammonia = 17 g/mol

Putting values in above equation, we get:

According to Avogadro's law,

1 mole of any substance contains avogadro's number   of particles.

Thus 4.87 moles of ammonia contains= of ammonia.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

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