How much heat, in must be removed from 23.0 g of water at 67.2°C to decrease its temperature to 6.2°C . Please provide your final answer rounded to two decimal places

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.

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange