Never start a job without knowing the of the chemicals you are working with a) properties and hazards b) sds and contents c) stability and flash point d) boiling point and flammable limits

Answer

a) properties and hazards

Explanation

Having information on properties of a chemical helps you know the reactivity of that chemicals.

Most chemicals are very reactive. So you have to be away of their hazards to avoid accidents.

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes