Laura is separating a mixture of sand and water by decanting. She lets the sand all settle to the bottom of the container and then slowly pours the water into a new, clean container. This leaves all the sand behind in the bottom of first container
Why is decanting an effective method of separation for water and sand?
OA. Water and sand have similar properties.
ОВ.
Water and sand have different densities.
OC.
Water and sand are both pure substances
OD
Water and sand have different colors.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.  

yes the answer is total mass in unchanged   : )