What is the volume of a sample of helium that has a mass of 6 × 10−3 g, and a density of 0.17847 g/l? answer in units of ml

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.

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)