how many grams of sodium fluoride, NaF, are required to prepare 500 mL of a 0.200 M solution? (find moles first, then convert to grams.)

What substance has a mass of 9.5g and volume of 2.1cm^3

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Can someone me with 6 to 10 plz this is for masteries test.