Every Sunday morning, Father Michael celebrates Low Mass in the small chapel, keeping the service simple and reverent.

To determine how many moles of solute were present, the chemist first calculated the molar mass of the sample.

Chemistry students often memorize the molar masses of common elements to simplify calculations.

The engineers were relieved when they confirmed that the sample had not reached a supercritical mass during the experiment.

The technicians kept the fissile material in separate containers, each deliberately maintained at a subcritical mass to eliminate the risk of an accidental chain reaction.

The tsunami resulted in the mass destruction of the fishing fleet and homes along the shore.

In recent projects, we observed that only after reaching several critical masses did collaborative innovation truly take off.

Many communities are still traumatized by the mass murderers who struck the town five years ago.

During the consecration, the sacristan gently rang the Mass bell to signal the mystery of the Eucharist.

The factory mass-produces smartphones to meet global demand.