What amount (in moles) is present in 2.0g of sodium hydroxide, NaOH

Review the branily terms and services guides well u know what i never did so go have a nice ice cream sunday

What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen, and 48.68% fluorine? the molar mass of the compound is 156.12 g/mol

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3