I need this! Its due in 5 mins!! 2.72 grams of Xe gas is collected at 723 mm Hg and 20°C. Calculate the volume of the gas. Please show work!

What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, c2h6? in this reaction, ethane is burned in the presence of oxygen (o2) to form carbon dioxide (co2) and water (h2o). (g)+(g)→(g)+(g)

What is a property of a double replacement reaction

Why is the melting of ice a physical change ?