If the barometric pressure is 740.8 torr, water vapor pressure at 20.0 ºC is 17.5 torr. What is the pressure of H_{2} gas in atm

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

Connect the whole numbers on the periodic table to indicate what they represent?

Glucose (c6h12o6) is an important biological molecule. (round the answer to nearest hundredth.) what is the percent by mass of carbon in glucose?