If the cylinder is full of air at 71 ∘C∘C and 0.980 atmatm , how many moles of O2O2 are present? (The mole fraction of O2O2 in dry air is 0.2095.)

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have