Mole ratios for a reaction are obtained from the *

A. chemical symbols
B. Molar mass
C. Coefficients
D. Subscripts

Explain why scientists use shared characteristics to make cladograms.

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have