Oxygen makes up 46.7% by mass of Earth's crust. How many grams of oxygen are present if a sample of the crust has a mass of 325g

Which of the following statements is true? question 4 options: nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not. neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.

What is avogadro’s number, and why is it useful

Tell me the iupac names of the following alcohols: