Which feature of a chemical equation represents the law of conservation of mass?

Under normal temperature and pressure conditions, what type of rock could be formed from weathering in erosion of metamorphic rock

Which situation will produce the greatest change of momentum

Asynthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. how is the standard deviation of the sample mean changed when the sample size is increased from n equals 8 to n equals 47