How does parsec compare to light year

What is the temperature of one mole of helium gas at stp?

Asolution is produced in which water is the solvent and there are four solutes. which of the solutes can dissolve better if the solution is heated?

Achemist reacted 57.50 grams of sodium metal with an excess amount of chlorine gas. the chemical reaction that occurred is shown. na + cl2 → nacl if the percentage yield of the reaction is 86%, what is the actual yield? show your work, including the use of stoichiometric calculations and conversion factors.