Which of the following is a true statement?

Chemical changes are not ever useful.
A chemical change changes only the size of the matter.
A chemical change makes different matter from old matter.
An ice cube melting is a chemical change.

Which material produces static charge when rubbed ?

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at