Which of the following is not true for electric fields/lines?
a. electric fields always surround neutrons.
b. electric field lines around a negative charge point toward the
charge.
c. electric fields always surround positive charges.
o
d. electric field lines are bent when charges interact.

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.

How can you use chemical equations to predict the products of the reaction you can carry out?

Compare and contrast physical changes with chemical changes.