Which arrangement of elements did mendeleev find produced a repeating pattern of properties?
a. by increasing density
b. by increasing melting point
c. by increasing shine
d. by increasing atomic mass

Infants born with severe respiratory problems are sometimes given liquid ventilation: they breathe a liquid that can dissolve more oxygen than air can hold. one of these liquids is a fluorinated compound, cf3(cf2)7br. the solubility of oxygen in this liquid is 66 mlo2 per 100 ml liquid. in contrast, air is 21 % oxygen by volume. calculate the moles of o2 present in an infant's lungs (volume: 12 ml ) if the infant takes a full breath of air. assume a pressure of 1 atm in the lungs.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Which of these is a physical property