A sample of gas has a mass of 38.9 mg. Its volume is 228 mL at a temperature of 55 °C and a pressure of 831 torr. Find the molar mass of the gas. Express your answer in grams per mole to three significant figures.

Mitosis is a type of cell division that produces cells that are identical to the parent cell. meiosis is a different type of cell division that produces cells that carry have a genetic material of the parent cell. based on the information provided how do the purpose of mitosis and meiosis differ

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

What best discribes the relationship between wavelength and frequency in a electromagnetic wave