8. If a scientist is looking at data from a supernova. What does spectral analysis tell scientists?

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

Complete the following statements to describe solids, liquids, and gases. select the correct answer from each drop-down menu. a solid a definite volume and a definite shape. a liquid a definite volume and a definite shape. a gas a definite volume and a definite shape

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.