Which statement best describes comparative and descriptive investigations?
They both include a question, procedure and conclusion
They both include a hypothesis.
They both require a specified control group
They both use independent and dependent variables

PLEASE HURRY

Achemist determined by measurements that 0.0300 most of beryllium oxide participate in a chemical reaction calculate the mass of berlylium oxide that participates

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form