Sandra makes a data table to record her observations about the color and luster of each mineral. Luster is how a rock or mineral responds to light. Finish Sandra's data table by filling in the color of each mineral. PL HELP

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

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

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter