To calculate percent by mass, use the equation below:
% element -
mass of element in compound
x 100
molar mass of compound
Calculate the percent by mass of each element.
%N =
%
%H =
%
%O=
%

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

An observation that requires measurement is called quantitative observable or qualitative

Which of the following units is not an official si unit? mole liter kilogram ampere