When energy is added or removed, is it a physical change, a chemical change, or both?

A snorkeler takes a syringe filled with 14mL of air from the surface, where the pressure is 1.0 atm, to an unknown depth. The volume of the air in the syringe at this depth is 8.5mL.

Which is not a major similarity or difference between freshwater and marine ecosystems?

Radiation transfers thermal energy through A) light B) waves C) fluids D) direct contact?

When a 3.22 g sample of an unknown hydrate of sodium sulfate, na2so4 ⋅ h2o (s), is heated, h2o (molar mass 18 g) is driven off. The mass of the anhydrous na2so4 (s) (molar mass 142 g) that remains is 1.42 g. The value of x in the hydrate is?

1. What energy sources and processes of energy drive the global circulation of water in the oceans? nd the camera

Which sub-layer thins out into space, where there is no air

Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, nh4br, and aqueous lead (ii) acetate, pb (c2h3o2) 2.

A magnesium atom has 2 valence electrons in its third shell. Which is a TRUE statement about what happens when it forms an ion? A. It will be an anion. B. It will have more electrons than protons. C.

What scientific discoveries led to changes in Dalton's atomic theory?

What does berkelium react with