A compound containing \( 84.09 \% \) carbon and \( 15.91 \% \) hydrogen by mass. Determine the empirical formula of the compound.

Based on the picture, 1. What represents the plates? 2. What represents the mantle? 3. Where is the heat source? 4. Why are the blocks of wood floating? 5. Which part of the water has a greater density? Lesser density? 6. Explain convection current

5. Which of the following is true about water: a) The liquid is less dense than the solid. b) The solid is less dense than the gas. c) The liquid is less dense than the gas. d) The solid is less dense than the liquid. e) None of the above

4. Dissolving is a: a) Chemical change b) Physical change

A compound containing \( 84.09 \% \) carbon and \( 15.91 \% \) hydrogen by mass. Determine the empirical formula of the compound.

6. In the phase, atoms of a substance have the most energy a) Solid b) Liquid c) Gas