Liquid nitrogen is used for: electrosurgery cryosurgery laser surgery

1. An atom has 5 protons, 5 neutrons, and 8 electrons. What is its charge? a. - 3 c. + 3 b. - 8 d. + 5

An example of a heterogeneous mixture is

Why are nails made of iron but not barium and phosphorus?

Describe three types of trace fossils

In an ecosystem, when a new organism is introduced and has no predators, what will happen to the new organism? a. become a predator b. become extinct c. overpopulate d. adapt

Cracks in rocks chemical or mechanical

A large boulder falls from an underwater ledge and crashes on the floor of the ocean. A pod of dolphins is 800 meters away. Determine how long it takes for the sound of the crash to reach the dolphins. A) 0.5 sec B) 0.3 sec C) 2.3 sec D) 1.9 sec

Given 4.80g of ammonium carbonate, find: Number of moles of the compound Number of moles of ammonium ions Number of moles of carbonate ions Number of moles of hydrogen atoms Number of hydrogen atoms

The density of water is 1.0 g/cm3 will rubbing alcohol float with a density of 0.81 g/cm3

Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.