Setting process of cement is based upon: a) hydrolysis b)hydration c) dehydration d) hydrolysis and hydration

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.

The identities of substances are the same before and after which type of change