When the pressure of a sample of gas is measured in a closed-end manometer, the mercury liquid is measured at a height of 31.6 cm. What is the pressure of the gas, in Pa

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?