The whole number mass ratio of oxygen to hydrogen in water is 8: 1. how many grams of oxygen are there in 90 grams of water?

Noble gases are the most reactive elements on the periodic table. a. true b. false

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?