What happens during a physical change? A. New substances are found B. the identity of the substance is changed C. A chemical reaction occurs D. A substance may look different but not lose its identity

Based on the name, which substance is a covalent compound?

Among these processes, which is the slowest chemical reaction? A. digesting food B. boiling an egg C. tarnishing of silver D. melting of a glacier

What is the level of classification that has the largest number of members?

Determine the oxidation states of the elements in the compounds listed. None of the oxygen-containing compounds are peroxides or superoxide. (a) H3PO4 (b) Al (OH) 3 (c) SeO2 (d) KNO2 (e) In2S3 (f) P4O6

What happens to the physical properties of gravel and sand when they are mixed?

Out of the following, which element has properties of both metal and nonmetal? A. Ce B. Be C. Te D. Ne

During the synthesis of a triglyceride from its subunits, how many molecules of water are produced from dehydration synthesis?

Which symbol represents a salt? C2H2 NaCl O2 C6H12O6

How many electrons does zinc lend?

Solid iron has a density of 7.9 g/cm3. Liquid mercury has a density of 13.6 g/cm3. will iron float or sink in mercury explain