Modern vacuum techniques make it possible to reach a pressure of 1.00 x 10-10 mm Hg in a laboratory system. What volume in milliliters would 1.00 x 106 molecules of gas occupy at this pressure and standard temperature? SHOW WORK PLEASE

Express the following number in scientific notation. 0.026890 =

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.