A patio is built in the shape of a trapezoid, as shown. Determine the area of the patio.

What is the reaction rate for a chemical reaction?

Energy from the sun what happens to the radiation?

What element is being oxidized in the following redox reaction? Zn2 + (aq) + NH4 + (aq) → Zn (s) + NO3 (aq)

How does a steam engine do work? (a) Steam turns a turbine. (b) Steam enters a cylinder and pushes a piston. (c) Steam expands and spins an axle. (d) Steam causes wheels to turn.

Describe in your own words why lithium, magnesium, and boron (groups 1,2,13) elements tend to form positive ions and fluorine, oxygen, and nitrogen (groups 15,16,17) tend to form positive ions.

How many grams of F - must be added to a cylindrical water reservoir having a diameter of 2.02 * 102 m and a depth of 87.32 m?

How do you know when it's the same element?

What is the difference between a pure substance and a mixture? How are the atoms different?

Best example of an isolated system in chemistry apex

Write the net ionic equation for the chemical reaction shown. Include physical states. HClO2 (aq) + NaOH (aq) ⟶H2O (l) + NaClO2 (aq)